Using a Time Machine back up of my old MacBook Air, I successfully transferred my User Account (let's call it "X") to my new MacBook Air. QUESTION - Is it now possible to change the name of User Account "X" on my new MacBook Air? If so, how?
MacBook Air (2020 or later)
See if this helps Change the name of your macOS user account and home folder - Apple Support
Please have a backup before trying this. I've seen people having some trouble when changing this.
I advise to create a second admin account before changing your main one. This might help you get in if anything goes wrong after changing your main account's name.
Setting up a new Mac
