2 Replies Latest reply on Mar 19, 2016 1:20 PM by Just Shoot Me

    Running LR on Mac & PC with local copies?

    CarlJStoneham

      For quite sometime now, I've been thinking I want to be "OS agnostic" with respect to Lightroom. I love the program, but don't want to be up the creek if my Mac or PC dies. For the past several years, I've been storing my photos and videos in a DropBox folder on a HDD and just pointing LR to the location, but keeping the catalog and previews in a non-DropBox folder on a SSD. As such, the photos and videos upload, but the Lightroom catalog and previews do not. I do not want to change this arrangement, preferring to have only the photos/videos in the cloud. What I DO want to do is have LR on both PC and Mac generate local previews of the local files. That's easy enough to do, but I also don't want to lose edits made on one machine when viewed on the other. So with the background out of the way, I have two main questions...

       

      1. Am I correct that writing metadata to XMP sidecar files will ensure that any edits made to a RAW file on, say, the Mac will be reflected on the PC, and that this happen automatically (i.e. LR is smart enough to look for the .xmp when viewing a photo)?

       

      2. Assuming I do not have LR-PC and LR-Mac open at the same time (and am sure that DropBox has finished syncing), am I correct that the risk of file corruption will effectively be nil (at least when it comes to corruption caused by Lightroom)?


      To be clear, I am not looking for a different way of doing things (e.g. syncing the catalog itself). Unless the setup above absolutely will not work, it is how I'd prefer to do things.

       

      Thanks in advance.

        • 1. Re: Running LR on Mac & PC with local copies?
          dj_paige Level 9

          The only real way to do such a thing is to put the catalog file and photos on an external HD and move the external HD from computer to computer.

           

          1. Am I correct that writing metadata to XMP sidecar files will ensure that any edits made to a RAW file on, say, the Mac will be reflected on the PC, and that this happen automatically (i.e. LR is smart enough to look for the .xmp when viewing a photo)?

          No, you are not correct.

           

          You would have to manually instruct LR to read the metadata from the xmp sidecar files, Lightroom will not do this automatically. Forget once, and your Lightrooms are out of sync. Furthermore, some information cannot be stored in XMP, such as your edit history, collections, pick flags, virtual copies, and a few other things.

           

          2. Assuming I do not have LR-PC and LR-Mac open at the same time (and am sure that DropBox has finished syncing), am I correct that the risk of file corruption will effectively be nil (at least when it comes to corruption caused by Lightroom)?

          The risk of file corruption is NEVER nil no matter what system you use. However, it is for most situations, very very small. Again, this assumes you don't make a mistake somewhere along the way (and similarly Dropbox does its job without problem).

          • 2. Re: Running LR on Mac & PC with local copies?
            Just Shoot Me Adobe Community Professional

            The only problem using both a Mac and a Windows system is that they address hard drives and folders differently.

            Windows uses DriveLetters and the Back Slash ( \) and OS X uses DriveNames and the forward slash ( / ). LR looks for the Catalog file based on the PATH to it. On Windows it would be DriveLetter:\FolderName\FolderName\CatalogName. OS X would be DriveName/FolderName/FolderName/CatalogName.

             

            Then you have how the external is formatted, if you plan on using an external drive.