Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
Log into osx with a user who has administrative privilages. then go into system prefs and ckick users. there (might be)/(will be) a closed lock in the bottom left corner. click it and put in the system password.

you should be good to go from here. just highlight the user and click minus.


[if i'm wrong, it's because i'm at a windows terminal at work now. i'm sure someone else will correct :) ]
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.