Open a Photos Library that was backed up in Time Machine
I want to open a Photos Library from Nov 2019 that was backed up to a Seagate external hard drive using Time Machine. The external hard drive was used to back up my old IMac. When I connect the external hard drive to my MacBook, I can find the photo library from Nov 2019. When I try to open the library, Photo gives me an error message "Photos attempted to repair the library "Photos Library", but is unable to open it."
I saw a similar question in the forum about entering Time Machine, but I could not figure out how to do that. That did not work for the person who asked anyway.
MacBook