JPEG 2000 is not widely suported. Not sure how tightly the standard is enforced, so maybe you have a file that is a little odd. Irfanview is a little looser in what it will open than PS so you might try it.
Is there a version for Mac OS X 10.8?
Here is quote from Irranview FAQ
Q: Can I use IrfanView on Mac?
A: Yes, probably. There is no native-Mac version of IrfanView. However, you can use IrfanView in conjunction with Mac program like WineBottler/DARWINE. Take the ZIP version of IrfanView and unzip it or copy your existing Windows IrfanView folder to Mac. This is easier because the installer may need additional Windows DLLs to run.
Have you tried opening file in other Mac programs? If you can open then use "save as" and convert or make new copy as JP2.
See if Preview will open it then save to a new file which Photoshop will open. You'll want to use a lossless format to avoid degrading the image. A resaved JPEG-2000 may do the trick, but three you could try are:
JPEG-2000, quality: lossless
TIFF, compression: LZW
I don't know the image dimension and file size limits of these formats.
Thanks, Preview says file could not be opened. Also says the file could be damaged or in a file format Preview does not recognize.
Do I need to download and install these programs as well, WineBottler/DARWINE prior to Irranview?
Not sure how to go about it. Do a web search for irhanview for mac. There are several hits.
I see in one that many users like Preview. If that says it is damaged then Irranview may give you the same results.
Do you have another computer that is not running Mt. Lion to try it on?
I would try a new download of the JP2 before considering downloading and installing a Windows emulator.
Yes, I have tried on another Mac running on OS X 10.7 and Preview has the same error when trying to open the file. I will as you suggest try and download a new JP2 file and see if I have better luck with that. I can only do that on Tuesday though, so thanks you for your help and speak again later.
If you have multiple applications telling you the file is damaged/unreadable, then the file is probably damaged... This is not really surprising if you've downloaded a 2 GB image file from the internet. Redownload is the best option, especially if you can get something to help with the download, something that will verify the download once complete.
Did not notice this was a 2.11 gig file. Maybe that is part of the problem?
As far as I know, JPEG2K doesn't have a file size limit.
I have just opened the file successfully on my work PC and I can see and load the file in our mapping software called ArcMap. I can even preview the file in ArcCatalog? The native file format for these programs is SID which Photoshop does not open!
I did not download the file from the internet, I transfered the file from my PC (windows) onto an external hard drive and then copied it onto my Mac to edit in Photoshop, but alas no luck!
Export a TIFF from ArcMap and open that with Photoshop.
I don't know how big your image is but I've opened a 70,000 by 70,000 pixel LZW-compressed TIFF with Photoshop CS6 on my Mac.
Your TIFF will save and open more quickly if it is uncompressed. However, substantial (and sometimes enormous) storage space reduction can be made by compression.
I Use CS6 64 bit on Windows 7.
I found that some JPEG 2000 files can be opened in CS6 while some other files cannot be opened withe standard message "the file format module cannot parse....."
I do expect Adobe should give some answers about what is supported and what is not.
We have some KAKADU produced files and also some produced by ECW/JP2 Intergraph LATEST SDK.
We were looking at HIRISE JP2s last night. HiRISE | Sedimentary Fans North of Mojave Crater (ESP_038851_1900)
Same parsing problem in Photoshop CC 2014, and my Dell i5/6 GB turned into a slug dealing with one of them.
You may want look here Photoshop Family Customer Community and launch it as an idea, suggestion, or bug as well.
We are basically volunteers for troubleshooting and techniques, and your issue should get better attention there.