Photos not working.
Just installed new system 12.0.1 and Photos will not open the library which I had previously moved to an external hard drive. Won't allow me to re-migrate it?
Question marked as
Hi
Regarding the external drive - is it correctly formatted for a photos library?
It must be formatted APFS or MacOS extended (journaled) (preferred for spinning drives)
It Must not be (or have been) used for time machine. (A time machine drive can be used if re-formatted)
It must have the 'ignore ownership" checkbox ticked.
It must be directly connected (No ethernet or wifi)
See
https://support.apple.com/en-gb/HT201517