disconnecting the old user?
Ive taken over my brothers old laptop, I've changed the Apple ID to my own but he is still connected to this one while using his other MacBook so I kee getting his files and vice versa , how do I disconnect his old Apple ID without deleting his active one that he uses, and is it possible to do so without having to completely reset this laptop so I don't lose all my files I have on here?
MacBook Pro (2017 – 2020)