I did a clean install of Catalina on my iMac and now my Time Machine backup on an external drive will not be recognized by my Mac. I can see all of the files I need in Time Machine via Finder and have successfully moved everything I need over to my Mac…except my photo library. I've tried about everything (copy-paste, click-drag, command-option while launching, importing via the Photos import option) and it just won't work. Possible issue: I may have encrypted my Time Machine backup (I honestly don't remember if I did) so that may be another issue. I can see the photos, even open them in Preview or Photos, they have the correct extensions (.jpg etc) but I can't get them into Photos.