Tech, Gadgets, Photography, Social Media and Poor Spelling
If you don’t want to deal with the lengthy process of changing the short user name in Mac OS X, an alternative is to setup user name aliases. A user name alias functions as a simple way to create a shorthand version of an account name. For example, if a users full account name is “Boba Fett the Bounty Hunter” they could setup an alias for “BF” or “boba” and just login with the shortened version instead.
This is a much easier process than changing the actual user account name:
You will now be able to login from the various Mac OS X lock screens including standard logins, user account switching, or screen savers, with the shortened user name alias. This is obviously not the same as changing the actual user name, but for just creating an abbreviation or for a minor adjustment for aesthetic reasons (changing text case, etc), this will work.