Is it safe to delete the old photo library?
I've been able to move some files over from one user to another thanks to the help of Old Toad’s Profile - Apple Community and now I want to know if it's safe to delete the old iPhoto Library from 2015 and I'm fairly certain the newer one, Photos Library 2, includes all of its content and newer content as well.
Is there any way to be sure?
When I try to open the older file I get the attached message.
I'm looking forward to deleting the older file but I need to be absolutely sure that the newer one will function.
MacBook Air, macOS 12.6