I recently upgraded our family iMac to 10.10.3 from 10.9. I migrated the iPhoto library to a Photo library almost immediately after upgrade. I am seeing the following behaviors occur 6 or more hours after the migration completed:
- Thumbnails display as blank white rectangles for some photos in the library, including some taken last year.
- Double-clicking on those thumbnails to open the photo will open the photo for viewing with some of them, for others, it will display a only the blank white background of the interface.
Do I need to be patient and allow Photo to index all the photos, thereby rebuilding the thumbnails, again? Can I instruct Photos to regenerate thumbnails again? I tried Command+Option and opening Photos, but that just repairs the library. I have read that does not regenerate the thumbnails. Any suggestions are appreciated.