Note – If you repair a Photos library that is automatically updated with the iCloud, then the entire library will be re-updated once the repair process is complete.
The higher the number of photos, the longer it will take to repair. If your Photos application is already open, then first close it and open it again. All you need to do is follow these steps: The Photos Repair Library tool present on your Mac can help tackle the issue.
Solution 1: Use Photos Repair Library tool So, we thought of enlisting the solution for this issue.
This error causes the app to close down and at times can be frustrating. One such error experienced by users is ‘Photos was unable to repair permissions on your library’. But still, a few lingering issues continue till date. Photos app has vastly improved from its earlier days.