Upgraded to Mojave and now Photos app won't work
I have over 65,000 photos in my iCloud Photo Library....and just upgraded my Mac Mini to Mojave. I have the settings set to save the photos in the cloud with just minimized images saved locally. Even so my hard drive on the Mac Mini began filling up years ago and so I moved my Photo app library to an external HD with plenty of room.
The first time I opened the Photo app after the upgrade to Mojave....it said it needed to update the photo library....which took forever. It never really got 100% done....it got to 99% and got stuck. After leaving it alone over night I finally had to reboot my Mac....since the Photo app was locked up and would not close. After booting up the Mac once more now the app won't even open. I get the following error message: "Photos must quit because the photo library has become unavailable or its data is corrupt."
I initially thought maybe the HD itself was corrupt or had crashed....but all the other files on it work fine. It's just the photo library file that appears to be damaged or corrupt. I tried the Disc Utility First Aid on that HD and it could not run it's diagnostic. It gave this error message: "First Aid could not unmount the volume for repair."
I checked my photos in my iCloud Photo Library using my MacBookPro....and they seem to be all present and accounted for....no problems there.
So....I don't think my photos are the problem so much as the Photo Library file itself being goofed up somehow on the HD.
How can I fix this?
Would it work if I were to delete that file? How do you recreate your Photo Library file?
Thanks in advance...
Dan
Mac mini, macOS Mojave (10.14), Intel Quad Core 2.3 GHz i7