Phone syncing to Mac in Finder. Not using iCloud Photos
Takes forever when reading photos library. Like at least an hour.
In Activity monitor, com.apple.amp.devicesui (Finder) gets stuck. Not responding
Mac mini
Sometimes Finder USB sync to iPhone/iPad is so slow that I have suspected it is stuck. Just the other day I was prepared to disconnect iPad (I then checked com.apple.amp.devicesui and it seemed to be active with about 100% CPU time which seemed promising) then it continued and succeeded. (iPadOS 26.3, Sequoia 15.7.4).
You might try again after rebooting both devices. Or try in safe mode.
iTunes/Finder Photos sync has always been more or less flaky and I have tried to do all kinds of voodoo with it although lately it has been almost OK (knock on wood). For example: open the Photos library on an external disk, reboot, open the library to the background, then sync via the Finder.
Or if all else fails, make a backup (just in case) and right click or control-click the "Photos Library.photoslibrary", choose "Show Package Contents" and delete the "iPod Photo Cache" folder (it holds a database of previous syncs and might have been corrupted. It is re-created in the next sync. It can be several tens of GBs large normally). Empty trash and restart the computer. Then try to sync again.
Sometimes Finder USB sync to iPhone/iPad is so slow that I have suspected it is stuck. Just the other day I was prepared to disconnect iPad (I then checked com.apple.amp.devicesui and it seemed to be active with about 100% CPU time which seemed promising) then it continued and succeeded. (iPadOS 26.3, Sequoia 15.7.4).
You might try again after rebooting both devices. Or try in safe mode.
iTunes/Finder Photos sync has always been more or less flaky and I have tried to do all kinds of voodoo with it although lately it has been almost OK (knock on wood). For example: open the Photos library on an external disk, reboot, open the library to the background, then sync via the Finder.
Or if all else fails, make a backup (just in case) and right click or control-click the "Photos Library.photoslibrary", choose "Show Package Contents" and delete the "iPod Photo Cache" folder (it holds a database of previous syncs and might have been corrupted. It is re-created in the next sync. It can be several tens of GBs large normally). Empty trash and restart the computer. Then try to sync again.
iPhone sync to Mac - Photos. The com.apple.amp.devicesui (Finder) gets stuck. Anyone else seeing this?
