I've suddenly had major problems with Photoshop on Mac Studio. The PSD files open extremely slowly and some simply won't open. Messages says “Could not open xxx because it is not a valid Photoshop document. Any ideas of what to do?
When I have a file that won’t open, I open it in Mac Preview first, then Save or Export it. In the case of a wrong extension, you can delete the extension and save it in Preview. The correct extension will be added back in.
Can you give this a try?
Jane
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