Thank you.How to change the user name on a Mac?That's the short name and it's not a good idea to change it. That name is used by the system and you can get all kinds of fun problems by playing with it.
Just create another user account, put anything you want to keep at the root level of the hard drive so both accounts can access it, log into the new one, then delete the old one and put all that saved data back where it goes.
