27 Replies Latest reply on Oct 21, 2018 1:46 PM by JohanEl54

    transferring LR catalog to new Mac: app to open helper and previews components

    brucep67347656

      I have LR classic and am familiar with how it, and catalogs, work. I recently purchased a new iMAC to replace my similar old one, and migrated my catalog folders to the new MAC HD, where they are in place. I then migrated my several TB of image folders to the connected external HD.

      My LR catalog recognises the images and the image folder structure is in place and the images are in LR: but the work that I did in the past is not findable; and my collection folders, although correctly listed in LR, are empty.

       

      The migration process was done for me by the IT people at the scientific institute where I work, and I think done correctly.

      When I look at the LR catalog folders on the HD of my new iMAC, the 'master ir cat' icon is coloured blue and can be opened; but the 'helper ir data' and 'previews ir data' and not coloured and when I click to open them a message comes up that says there is no application to open them. It says to choose one:  but i have never had this problem before and do not know a] whether this explains my current problem - it seems probable  and b] if so,what app to choose.          bruce p

        • 1. Re: transferring LR catalog to new Mac: app to open helper and previews components
          JohanEl54 Adobe Community Professional

          Sounds like these IT people may not have done it correctly after all. They may have created a new catalog and imported the images again, instead of correctly moving the old one. Better ask them what they did exactly. This is how they should have done it: https://www.lightroomqueen.com/how-move-lightroom-to-new-computer/

           

          Those file colors are irrelevant, they are just something you can do in the Finder if you want to. The fact that there is no app to open the helper.lrdata and previews.lrdata is also normal. These are support files that belong to the catalog. Lightroom uses them, but you are not supposed to open them directly in any app, not even in Lightroom.

          • 2. Re: transferring LR catalog to new Mac: app to open helper and previews components
            brucep67347656 Level 1

            many thanks.   From the points you make it does sound as if the transfer was not made properly.  I will follow the method you sent and try again.

            • 3. Re: transferring LR catalog to new Mac: app to open helper and previews components
              brucep67347656 Level 1

              Johan     I tried to follow the steps  in the Lightroom Queen link that you kindly sent yesterday ( problem with transfer of LR catalog; iMAC) but still have a problem.  If you can help I'd be really grateful. I realise that this is already quite complicated and I apologise for taking your time.   I will also understand if you cannot undertake to do this for everyone who contacts you.

              First,  you asked what did my IT colleagues do?  I am pretty sure that- I transferred my current LR cat plus previews etc to the new iMAC; and they are there on the MAC HD in the same folder structure as before- then my colleagues first transferred my image folders directly to a new external HD thru the iMAC, without importing them into LR; then it seems they decided they should have gone thru LR and so they created a new catalog and reimported some of the folders again thru LR.  Specifically, I had two sources of images to move across  1] from an existing but old HD  and 2]  images from another external HD that had been rescued by a specialist outfit from a HD that had been corrupted.   Both relate to the same LR catalog.  It seems that they originally copied both sets across to the new HD without going thru LR, and then reimported set  this time thru LR.

              What is the position now?1] both sets of image folders copied across to the new external HD by IT are there on the HD but are missing at the folder level in LR in my old catalog. In the new catalog used by IT they are there but of course without associated data about previous work.2] I had, before posting my question yesterday, re-imported as a test two of the 'year' folders from set 2 into LR from through my original LR catalog, after of course closing the new catalog used by IT.  They all appear now in LR, but the associated editing data / history seems to be missing, and although the Collections folders are all correctly listed, and image boxes with the correct IDs are displayed in the grid view, the  images are missing.3] So, I understood the instructions you pointed me to, to say that I should not have imported thru LR; so today I reimported a couple of folders as a test simply by copying from the HD on which they were backed up with LR not open, and then opening LR with the master catalog.  Again,the folders and mages appeared in LR; but not the metadata and Collection images.   As a further test ( I know not recommended as a rescue strategy) I located a small number of the 'missing' images ( missing from the Collections folder), went to the HD location and restored them:  they now appeared in Collections, but the images are severely altered, to the extent that they are useless.

              I have read section 6 'relink missing files' in the instructions you said; I am familiar with the cause and remedy for missing files when one has moved them outside LR, but here the problem is not missing files, but missing associated data.  The drive letter reset appears to relate to windows and to be very complex.  I don't have presets or preferences to worry about.

              I have everything backed up on other HDs.  Should I just wipe the new set- up and start again?  Any advice will be much appreciated

              thanks     bruce ponder

               

              Post Edited to remove unnecessary content embedded by forum - ILyons

              • 4. Re: transferring LR catalog to new Mac: app to open helper and previews components
                dj_paige Level 10

                It sounds like you have done a lot of work, but you have NOT performed the critical steps, which are: to open the Lightroom catalog from the previous computer (your photos edits and user-supplied metadata are in this catalog), and from there you need to re-link the photos as described in section 6.

                 

                There is NO importing of photos or re-importing of photos necessary, in fact importing photos (or re-importing photos) is 100% wrong. This is not a step in the process. That is so important, I am going to say it again.

                 

                DO NOT IMPORT. DO NOT RE-IMPORT.

                DO NOT IMPORT. DO NOT RE-IMPORT.

                DO NOT IMPORT. DO NOT RE-IMPORT.

                DO NOT IMPORT. DO NOT RE-IMPORT.

                • 5. Re: transferring LR catalog to new Mac: app to open helper and previews components
                  brucep67347656 Level 1

                  Thanks again for such a quick response. What I did was copy the LR catalog from the previous computer via an external HD onto the new one, and verify that it is there on the MAC HD in the same folder structure as before.   Have I missed something?

                  Is it possible that all the mis-starts which involved importing, and which are still on the  MAC and HD, are interfering in some way?  I have tried copying some photo folders from my back up HD into the external HD that will be my HD for the MAC, but without importing thru LR, - whoch is the correct procedure?- and I still got the result that the photos link with the LR catalog when LR is opened,but not with the metadata and Collections.

                  I have checked that when I open LR (both when I have recently imported some entirely new images in the usual way, which worked fine, collection as well; but also when I am trying to link my folders from the previous HDs) the catalog that is open is this one, which I have used thru successive back ups and LR updates for about 10 years. In compressed form it is about 3.8 GB.

                  So it sounds as if I still need to re- link the photos ( though I am not sure why they got unlinked).Section 6 is not very explicit.  I am not in Windows, but in Mac OS.  Do I try to reset the drive letter? I hesitate because I am not sure how it will go in Mac OS and it looks like it might be easy to screw up.

                  As I said briefly in my previous e mail, when I did a test of the 'locate /  re link' procedure that one uses when files get missing because they have been moved out of LR, on just a couple of individual image files, they DID relink and appear in Collections: but the 'collection' images were hugely  distorted in terms of colour, luminosity etc whereas the 'parent' images in the LR folder were fine - but were the unedited versions only.

                  Thank you for your patience.    On Sunday, 21 October 2018, 13:44:09 BST, dj_paige <forums_noreply@adobe.com> wrote: 

                   

                     

                   

                  transferring LR catalog to new Mac: app to open helper and previews components

                  created by dj_paige in Lightroom Classic CC — The desktop-focused app - View the full discussion

                  It sounds like you have done a lot of work, but you have NOT performed the critical step, which is to open the Lightroom catalog from the previous computer. Your photos edits and user-supplied metadata are in this catalog, from there you need to re-link the photos as described in section 6.

                   

                   

                   

                  There is NO importing of photos or re-importing of photos necessary, in fact importing photos (or re-importing photos) is 100% wrong. That is so important, I am going to say it again.

                   

                   

                   

                  DO NOT IMPORT. DO NOT RE-IMPORT.

                   

                  DO NOT IMPORT. DO NOT RE-IMPORT.

                   

                  DO NOT IMPORT. DO NOT RE-IMPORT.

                   

                  DO NOT IMPORT. DO NOT RE-IMPORT.

                   

                  If the reply above answers your question, please take a moment to mark this answer as correct by visiting: https://forums.adobe.com/message/10695063#10695063 and clicking ‘Correct’ below the answer

                   

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                  • 6. Re: transferring LR catalog to new Mac: app to open helper and previews components
                    brucep67347656 Level 1

                    Further response   - having looked again at section 6, I think the problem may be that my IT colleagues gave the  topmost parent folder that subtends all the folder structure - set out in years, then dates, - new names when they transferred the folders.   Certainly the problem is one that affects the entire folder set.So - do I need to figure out what the parent folder was called in the previous MAC where I cannot now access LR?  I'll keep reading section 6 and if this is the answer I'll let you know at once so you don't spend more time

                    thanks   bruce    On Sunday, 21 October 2018, 13:44:09 BST, dj_paige <forums_noreply@adobe.com> wrote: 

                     

                       

                     

                    transferring LR catalog to new Mac: app to open helper and previews components

                    created by dj_paige in Lightroom Classic CC — The desktop-focused app - View the full discussion

                    It sounds like you have done a lot of work, but you have NOT performed the critical step, which is to open the Lightroom catalog from the previous computer. Your photos edits and user-supplied metadata are in this catalog, from there you need to re-link the photos as described in section 6.

                     

                     

                     

                    There is NO importing of photos or re-importing of photos necessary, in fact importing photos (or re-importing photos) is 100% wrong. That is so important, I am going to say it again.

                     

                     

                     

                    DO NOT IMPORT. DO NOT RE-IMPORT.

                     

                    DO NOT IMPORT. DO NOT RE-IMPORT.

                     

                    DO NOT IMPORT. DO NOT RE-IMPORT.

                     

                    DO NOT IMPORT. DO NOT RE-IMPORT.

                     

                    If the reply above answers your question, please take a moment to mark this answer as correct by visiting: https://forums.adobe.com/message/10695063#10695063 and clicking ‘Correct’ below the answer

                     

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                    • 7. Re: transferring LR catalog to new Mac: app to open helper and previews components
                      dj_paige Level 10

                      Thanks again for such a quick response. What I did was copy the LR catalog from the previous computer via an external HD onto the new one, and verify that it is there on the MAC HD in the same folder structure as before.   Have I missed something?

                       

                      Well, I don't know if you did not perform the task, or if you performed the task and didn't write that you did ... but missing is the opening of that catalog file (which came from the old computer) on the new computer in Lightroom. Did you do that?

                       

                      So it sounds as if I still need to re- link the photos ( though I am not sure why they got unlinked).Section 6 is not very explicit. 

                       

                      This is a different set of instructions, which has more detail and screen captures. In particular, you need to follow the instructions at Figure 4 (and possibly Figure 3)

                      Adobe Lightroom - Find moved or missing files and folders

                       

                      I am not in Windows, but in Mac OS.  Do I try to reset the drive letter?

                       

                      No. There is no such thing as a drive letter on Mac computers.

                       

                      Further response   - having looked again at section 6, I think the problem may be that my IT colleagues gave the  topmost parent folder that subtends all the folder structure - set out in years, then dates, - new names when they transferred the folders. 

                       

                      If the top level folder name is different, but all the subfolders are the same names, then Figure 4 of those instructions (and associated text) should be all you need.

                       

                      If it is more complicated than that, please show us a screen capture showing the folder hierarchy as seen in the MAC Finder of the folder(s) that contain your photos. Then please show us another screen capture showing the Folder Panel in Lightroom, when you open the catalog from the old computer.

                      • 8. Re: transferring LR catalog to new Mac: app to open helper and previews components
                        brucep67347656 Level 1

                        Thanks.  Screen shots attached.

                        Before I describe the screen shots, I have found something else that would (possibly?) make sense in relation to your suggestion that I had not transferred / opened the master catalog to my new computer - and maybe that I seem to have the original images in the LR catalog when I copy them over to the new iMAC but not the associated previous work / collections:Looking at the info in my master catalog preview files I find 24GB in the previews created to my master catalog ( which now includes several thousand recently taken and added images which ARE shown in the catalog), but 325GB in the previews associated with the new '2018' catalog that IT created when they copied or imported my archival images to the new MAC.  This is far more data than I thought was in previews _ my recollection from a few months ago was 58GB -, but maybe they built standard or something and so upped the info (the images are about 6TB in all).   So it looks as if the previews data are maybe now associated with the 2018 catalog and not my historical master catalog which I am using.   Or maybe they are there also in the historical catalog but in a less info-rich format?   Having said that, the images transferred across by IT seem not to be in any catalog at all in LR.

                        Screen shots:LR 'Drobo' is the name if my new external HD which will hold the images, while the catalog will be in the MAC.  The folders that look OK are a] 2007-2018 ones I copied across into Drobo: the 2018 ones ar new and are fine; the 2007- 2017 ones appear Ok in the catalog but lack the associated data.   b]  Svalbard 2018 old LRcat - recent ones imported thru LR in the usual way, all fine, made collection no problem

                        UK-684596/ Hfs Plus is the external HD of rescued folders, from which about 3TB of folders ( mostly 2014-May 2018) have been transferred into Drobo  by my IT colleagues and we are trying to get them into LR. The parent folder name UK 684586 is of course a new one that relates to a HD 'outside' the system

                        There is another similar external HD 'untitled'  just out of shot in the LR screen shot that was also used to transfer another large set of folders ( about 2.9 TB; 2006-2014) by my IT colleagues - this and its folders appear just as UK 684586

                         

                        Hope this helps..

                        many thanks     bruce ponder  

                            On Sunday, 21 October 2018, 14:30:05 BST, dj_paige <forums_noreply@adobe.com> wrote: 

                         

                           

                         

                        transferring LR catalog to new Mac: app to open helper and previews components

                        created by dj_paige in Lightroom Classic CC — The desktop-focused app - View the full discussion

                         

                        Thanks again for such a quick response. What I did was copy the LR catalog from the previous computer via an external HD onto the new one, and verify that it is there on the MAC HD in the same folder structure as before.   Have I missed something?

                         

                         

                         

                         

                        Well, I don't know if you did not perform the task, or if you performed the task and didn't write that you did ... but missing is the opening of that catalog file (which came from the old computer) on the new computer. Did you do that?

                         

                         

                         

                         

                        So it sounds as if I still need to re- link the photos ( though I am not sure why they got unlinked).Section 6 is not very explicit. 

                         

                         

                         

                         

                        This is a different set of instructions, which has more detail and screen captures:

                         

                        Adobe Lightroom - Find moved or missing files and folders

                         

                         

                         

                         

                        I am not in Windows, but in Mac OS.  Do I try to reset the drive letter?

                         

                         

                         

                         

                        No. There is no such thing as a drive letter on Mac computers.

                         

                         

                         

                         

                        Further response   - having looked again at section 6, I think the problem may be that my IT colleagues gave the  topmost parent folder that subtends all the folder structure - set out in years, then dates, - new names when they transferred the folders. 

                         

                         

                         

                         

                        Please show us a screen capture showing the folder hierarchy as seen in the MAC Finder of the folder(s) that contain your photos. Then please show us another screen capture showing the Folder Panel in Lightroom, when you open the catalog from the old computer.

                         

                        If the reply above answers your question, please take a moment to mark this answer as correct by visiting: https://forums.adobe.com/message/10695067#10695067 and clicking ‘Correct’ below the answer

                         

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                        • 9. Re: transferring LR catalog to new Mac: app to open helper and previews components
                          Ian Lyons MVP & Adobe Community Professional

                          The screenshots don't come through on email. Always best to use the forum. That way you can actually check that others see what you post, and avoid all  the Adobe email garbage being attached to emails.

                          • 10. Re: transferring LR catalog to new Mac: app to open helper and previews components
                            JohanEl54 Adobe Community Professional

                            Agreed. Bruce, you will have to visit the forums in your web browser, not by email. Then you can post some screenshots. None of your screenshots have come through so far (and by the way you weren’t talking to me the last few hours, but that doesn’t matter).

                             

                            Without screenshots it becomes very difficult to follow what you have done and what the IT people have done. It sounds like maybe they moved the images to a new folder structure when they imported them into a new catalog. Anyway, they should not have created a new catalog and imported anything, that is not the way to move Lightroom to a new computer.

                             

                            Finally, forget about drive letters. Macs don’t use that archaic system, they use disk names.

                            • 11. Re: transferring LR catalog to new Mac: app to open helper and previews components
                              brucep67347656 Level 1

                              thanks  and apologies - first time I have used a forum.  I see the instruction to go to the thread and click on the camera - but the only camera I see is next to a name and takes me to that person.   How do I load the screenshots?    bruce

                                  On Sunday, 21 October 2018, 16:09:03 BST, JohanEl54 <forums_noreply@adobe.com> wrote: 

                               

                                 

                               

                              transferring LR catalog to new Mac: app to open helper and previews components

                              created by JohanEl54 in Lightroom Classic CC — The desktop-focused app - View the full discussion

                              Agreed. Bruce, you will have to visit the forums in your web browser, not by email. Then you can post some screenshots. None of your screenshots have come through so far (and by the way you weren’t talking to me the last few hours, but that doesn’t matter).

                               

                               

                               

                              Without screenshots it becomes very difficult to follow what you have done and what the IT people have done. It sounds like maybe they moved the images to a new folder structure when they imported them into a new catalog. Anyway, they should not have created a new catalog and imported anything, that is not the way to move Lightroom to a new computer.

                               

                               

                               

                              Finally, forget about drive letters. Macs don’t use that archaic system, they use disk names.

                               

                              If the reply above answers your question, please take a moment to mark this answer as correct by visiting: https://forums.adobe.com/message/10695337#10695337 and clicking ‘Correct’ below the answer

                               

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                              • 12. Re: transferring LR catalog to new Mac: app to open helper and previews components
                                Ian Lyons MVP & Adobe Community Professional

                                brucep67347656  wrote

                                 

                                thanks  and apologies - first time I have used a forum.  I see the instruction to go to the thread and click on the camera - but the only camera I see is next to a name and takes me to that person.   How do I load the screenshots? 

                                 

                                 

                                Click on the button that I've applied a red border to in below screenshot

                                 

                                load images.png

                                • 13. Re: transferring LR catalog to new Mac: app to open helper and previews components
                                  brucep67347656 Level 1

                                  I am sorry,I must be  really dim  - but if I open the 'load images' url and click the outlined red button it is still not clear to me what to do with the screen shot.

                                  back in 90 mins.    bruce

                                      On Sunday, 21 October 2018, 16:20:07 BST, Ian Lyons <forums_noreply@adobe.com> wrote: 

                                   

                                     

                                   

                                  transferring LR catalog to new Mac: app to open helper and previews components

                                  created by Ian Lyons in Lightroom Classic CC — The desktop-focused app - View the full discussion

                                   

                                  brucep67347656  wrote

                                   

                                   

                                   

                                  thanks  and apologies - first time I have used a forum.  I see the instruction to go to the thread and click on the camera - but the only camera I see is next to a name and takes me to that person.   How do I load the screenshots? 

                                   

                                   

                                   

                                   

                                   

                                   

                                  Click on the button that I've applied a red border to in below screenshot

                                   

                                   

                                   

                                  https://forums.adobe.com/servlet/JiveServlet/downloadImage/2-10695327-1601667/load+images. png

                                   

                                  If the reply above answers your question, please take a moment to mark this answer as correct by visiting: https://forums.adobe.com/message/10695327#10695327 and clicking ‘Correct’ below the answer

                                   

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                                  • 14. Re: transferring LR catalog to new Mac: app to open helper and previews components
                                    dj_paige Level 10

                                    Before I describe the screen shots, I have found something else that would (possibly?) make sense in relation to your suggestion that I had not transferred / opened the master catalog to my new computer - and maybe that I seem to have the original images in the LR catalog when I copy them over to the new iMAC but not the associated previous work / collections:Looking at the info in my master catalog preview files I find 24GB in the previews created to my master catalog ( which now includes several thousand recently taken and added images which ARE shown in the catalog), but 325GB in the previews associated with the new '2018' catalog that IT created when they copied or imported my archival images to the new MAC.  This is far more data than I thought was in previews _ my recollection from a few months ago was 58GB -, but maybe they built standard or something and so upped the info (the images are about 6TB in all).   So it looks as if the previews data are maybe now associated with the 2018 catalog and not my historical master catalog which I am using.   Or maybe they are there also in the historical catalog but in a less info-rich format?   Having said that, the images transferred across by IT seem not to be in any catalog at all in LR.

                                     

                                    You have gone off on an irrelevant tangent. Previews have no impact on the success of your move to a new computer.

                                     

                                    Let's focus on re-linking the photos in your LR catalog. That's the only issue here.

                                    • 15. Re: transferring LR catalog to new Mac: app to open helper and previews components
                                      JohanEl54 Adobe Community Professional

                                      Bruce, you are still participating in this discussion via email. Like we said; don't do this. Your screenshots do not come through and Adobe adds a lot of extra garbage that make it difficult to read your message. Launch (Safari) web broswer and surf to transferring LR catalog to new Mac: app to open helper and previews components

                                      • 16. Re: transferring LR catalog to new Mac: app to open helper and previews components
                                        brucep67347656 Level 1

                                        Apologies once again to all.    As I said , this is my first experience of this web based interaction.  I could find no way to reply on the thread - until I worked out that I needed to log in all over again which I have just done..

                                        Maybe now I can send the screenshots whereas before the method I was sent by Ian Lyons didn't seem to work.

                                        bruce

                                        • 19. Re: transferring LR catalog to new Mac: app to open helper and previews components
                                          dj_paige Level 10

                                          You see that ? icon on the 2006 folder? Lightroom cannot find that folder. You have to find where the folder is using Mac Finder. Once you know where it is according to MAC Finder, you re-link it as shown in Figure 3 and associated text of the link I gave.

                                          • 20. Re: transferring LR catalog to new Mac: app to open helper and previews components
                                            JohanEl54 Adobe Community Professional

                                            OK, it seems that your folder hierarchy was completely changed. That is why Lightroom can’t find most folders anymore. The solution is easy, but you have to check this carefully. In Lightroom, several missing year folders are supposed to be in a folder called ‘UK-684586-Ponder-Data’. The screenshot of your disk shows that this folder still exists, but that those ‘missing’ subfolders were moved.

                                             

                                            There are two ways to deal with this. The first way is to restore the hierachy in the Finder, so it matches again with what Lightroom expects. The other way is to tell Lightroom the new location of each folder by right-clicking on it, choosing ‘Find Missing Folder’ and then in the dialog that follows navigate to and select the folder in its current location.

                                             

                                            An extra problem is that there seem to be copies of folders. For example the 2008 folder exists twice, and there is also a 2018.1 folder, which may be yet another copy. It’s up to you to find out. It is probably best to do this before you start relinking folders in Lightroom, or reorganising folders in the Finder.

                                            • 21. Re: transferring LR catalog to new Mac: app to open helper and previews components
                                              brucep67347656 Level 1

                                              Very many thanks to everyone.  One more question before I start -   some folders have been imported into a LR catalog already, which it is now clear was a mistake.  Some were imported thru LR to the new catalog created by IT,  some into my 'master' catalog.  I now see that presumably LR regards these as new images, and therefore without the previous history of work that of course I wish to retain?.Is there anything I need to do in respect of the folders that were imported in this way?   Can they interfere with restoring the whole body of folders, or can I just ignore them? If your  e mail response here is also in the thread I will add this to the thread ....

                                              best wishes  

                                               bruce ponder

                                                  On Sunday, 21 October 2018, 18:38:06 BST, JohanEl54 <forums_noreply@adobe.com> wrote: 

                                               

                                                 

                                               

                                              transferring LR catalog to new Mac: app to open helper and previews components

                                              created by JohanEl54 in Lightroom Classic CC — The desktop-focused app - View the full discussion

                                              OK, it seems that your folder hierarchy was completely changed. That is why Lightroom can’t find most folders anymore. The solution is easy, but you have to check this carefully. In Lightroom, a number of missing year folders ars supposed to be in a folder called ‘UK-684586-Ponder-Data’. The screenshot of your disk shows that this folder still exists, but that those ‘missing’ subfolders were moved.

                                               

                                               

                                               

                                              There are two ways to deal with this. The first way is to restore the hierachy in the Finder, so it matches again with what Lightroom expects. The other way is to tell Lightroom the new location of each folder by right-clicking on it, choosing ‘Find Missing Folder’ and then in the dialog that follows navigate to and select the folder in its current location.

                                               

                                               

                                               

                                              An extra problem is that there seem to be copies of folders. For example the 2008 folder exists twice, and there is also a 2018.1 folder, which may be yet another copy. It’s up to you to find out. It is probably best to do this before you start relinking folders in Lightroom, or reorganising folders in the Finder.

                                               

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                                              • 22. Re: transferring LR catalog to new Mac: app to open helper and previews components
                                                JohanEl54 Adobe Community Professional

                                                Trash the new catalog created by the IT people. This catalog does not contain any of your edits. Work only with your old catalog.

                                                • 23. Re: transferring LR catalog to new Mac: app to open helper and previews components
                                                  brucep67347656 Level 1

                                                  Many thanks to everyone who helped - I was very impressed by my first experience of this kind of thing.   If I get stuck maybe I can come back; but I think I should be able to sort it from here although the folders will certainly need a bit of sorting.

                                                   

                                                  One more question:  along the way, and now clearly understood as a mistake, some groups of folders have been imported thru LR, either into the new LR catalog set up by my colleagues, or into my own 'master' catalog.

                                                   

                                                  I assume that LR will treat these as entirely new images, and therefore disregard the history ( edits, collections) that I want to preserve?

                                                  In straightening out the mess, can I simply ignore these, or will they interfere, especially in my 'master' catalog,  with my efforts to align catalog and folders? Do I need to take some action, and if so what, to remove them?

                                                   

                                                  bruce

                                                  • 24. Re: transferring LR catalog to new Mac: app to open helper and previews components
                                                    dj_paige Level 10

                                                    If you can, transfer the catalog file AGAIN from the old computer to the new computer, so you have the exact copy of your catalog file with no new imports.

                                                     

                                                    If not, then disregard the new imports and re-link the folders as I described or as JohanEl54 described.

                                                    • 25. Re: transferring LR catalog to new Mac: app to open helper and previews components
                                                      brucep67347656 Level 1

                                                      Johan    understood about the IT- generated catalog.

                                                      I should have explained in my last post that the folders which appear to be OK in my screenshot of LR  (  the 2006- 2018 set) are only OK in so far as that the images appear in my LR 'master' catalog; BUT the associated edits do not. 

                                                      I suspect ( am I correct?) that this is because those folders were* imported* from the HD into the master catalog, and are therefore treated as 'new' images, without a history.  The import - a mistake - happened because they were not recognised by LR after the first IT effort.   I think - but have not been able to confirm - that they were all first copied into the HD not thru LR,  but when this seemed not to work,  a subset - the ones on the LR screenshot that look OK, which is the ones I am worried about - were then imported thru LR.  As I said, these seem OK until one looks for the edits and collections.

                                                       

                                                      So I need to identify on the HD all of these folders and align them with the LR master catalog as you describe; but my worry is that some of them are already in that catalog as 'new' images, having been imported thru LR, and might interfere.  Is that a potential problem?

                                                       

                                                      I hope that's it!        bruce

                                                      • 26. Re: transferring LR catalog to new Mac: app to open helper and previews components
                                                        brucep67347656 Level 1

                                                        clear; many thanks for your help and patience      bruce

                                                        • 27. Re: transferring LR catalog to new Mac: app to open helper and previews components
                                                          JohanEl54 Adobe Community Professional

                                                          Any images you imported (again) will indeed not have their edits. You should remove these folders from Lightroom (right click) because you do not want duplicate images, and because you will indeed get an error when you try to reconnect them.