Since the new update (Sequoia 15.4), a new photos library appeared on my desktop. My normal library, located in the "Pictures" folder, seems unaffected. I tried opening the new library to see what it was but got prompted with "The library could not be opened... (4301)". I tried to delete the library but it reappears after a short period of time. How do I get rid of this?
MacBook Air 13″, macOS 15.4
You didn't say, but it sounds like you have your Desktop folder in the iCloud Drive folder-- is that right? Do you have Optimize Storage turned on?
As you see here, I don't. Have you re-started your Mac?
As the error message said, Photos Libraries can't work from the iCloud Drive folder. Try dragging this thing from iCloud Drive>Desktop to the Pictures folder, and leave it awhile. See if it stay there, and the try deleting it later.
If that doesn't help, then to narrow things down, try to Re-start in Safe Mode. This bypasses certain potentially disruptive processes, and it often helps. Safe Mode is different for different computers, so see this:
Start up your Mac in safe mode - Apple Support
Let us know what happens…
A photos library file (Photos Library.photoslibrary) keeps reappearing on my desktop
