Changing Users Name - different from the other post below

Select your user id in the finder window and drag it under places.
Drag the one that you don't want off the sidebar.

I may have misunderstood your post. Your account name won't be the same as your user name. It will be the short name. Ex: Karma Krafts account name may be karmakrafts as the user name. It will be located in the user folder under the hard drive. If this is what you're referring to, I'm not sure it can be changed.

Addition: The user name (short name) will be in the sidebar of the Finder Window and should match your user id in the user folder.

Message was edited by: Glenn Leblanc

Hi,

Just to amplify -

An account actually has two names, the "long name" (now called "Full Name" in System Preferences), and the ""short name" (normally a single word in lower case, called "Account Name" in System Preferences when you first set up an account).

When you set up a user account and enter your "Full Name," the system will suggest an Account Name (the "short name"), and you have *just this one chance* to change it:
.

.

Once set, the short name becomes the name of your home folder (the house icon in Finder) and is not easily changed. You can't just change the home folder name, because the short name is also an intrinsic part of your user account. However if you very much want to change the short name, there are a few ways to do this. Apple's method is here:

*Mac OS X: How to change user short name or home directory name*
http://support.apple.com/kb/HT1428?viewlocale=en_US

It's somewhat complicated as you will see, and changing the short name this way can sometimes introduce a few permissions glitches. You could still try it, or since your Mac is still new, you might instead consider wiping the HD and starting over.