My computer is still showing remnants of the old Apple ID I used to have an Apple ID that I shared with my family, but it was becoming more and more obvious that I would end up needing my own. So I got myself an Apple ID, got family sharing set up, and switched everything out on my iPad. When I got to my computer, things got more complex. First, I logged out of iCloud and logged into my Apple ID instead. Then, I switched iMessage, FaceTime, Game Center, and a few other things. The problem is, my computer is still showing remnants of the old Apple ID. Is there a way to completely switch Apple IDs with one login on an iMac? Or do I just have to switch everything as I go along?

(Edit:) It would be too inconvenient to create a new user account because I have a lot of settings to applications adjusted and my computer too rigged up.
Apple does have several places for id - I have for historic reasons 2 different ids and so note some of the differences.

There are actually separate places that have logins.


iCloud/Mail login
iTunes login for music/vides etc
iPad/iPhone app store
MacOS store
Apple developer (I have several different ids here)


I have one id for 1 and another for the rest and others for 5. But I think the Mac Appstore could be set as a different id.

2 and 3 might  be the same (although that could be historic as iOS apps were updated via iTunes)

This does mean that you will need to change id separately for 1,2,4 and 5 (I think 2 and 3 are covered by one change)