Change the username
I am not able to change the Account name. It is not changeable. What should I do? I need to change the name of my user. It is an admin user. How should I do it?
MacBook Pro 13″, macOS 11.2
Question marked as
Since you say "admin user" I presume you mean on your computer?
Click on the links and read the document:
Change the name of your macOS user account and home folder - Apple Support - https://support.apple.com/HT201548
Folders that come with your Mac
https://support.apple.com/guide/mac-help/folders-that-come-with-your-mac-mchlp1143/mac
"Important: Your home folder and certain other folders can’t be renamed. It’s best not to rename or move folders that came with your Mac."