Reference: Medium Article by Ambrose Little
I recently migrated to a new MacBook Pro. The old one was on High Sierra, but the new one wasnβt. So I created a temp βadminβ account to do the upgrade, then do the migration with Migration Assistant.
All seemed okay, but when I went to delete the original user account, I couldnβt. And I donβt mean βyou donβt know how to delete accountsβ couldnβt. I mean, I tried every possible way, and it wouldnβt couldnβt.
I found this thread on the Apple forums with people having the same problem. After trying everything else, this is the solution shared in one of the replies that worked. Warning, I have no idea of the side effects this might have, but so far so good for me. Also, do not come crying to me if it totally hoses your machine. Youβve been warned!