This gets rid of everything and, when she starts it up, it will prompt her as if it were a new machine that has not had a previous owner.
Another way is via System Preferences, Users and Groups.
Create a new User and check the "All user to administer this computer"
Create a password for that account and don't forget to tell the new user what it is.
Now, still in System Preferences, select your account and hit the - button. Follow the instructions there and decide what method you want to use. Either way, your Home folder is deleted.
Hope that helps
I mean to give my MacBook Pro to a friend, but I need to clean my stuff off of it and make her the administrator. This is probably simple, but I don't know how to do it.