I have also forgotten my adminstrators password!
MacBook Air
Apple menu > Logout Guest
Reset Password
OS X 10.7 Lion /10.8 MountainLion
Follow the instructions in the first and the third boxes.
http://pondini.org/OSX/Password.html
Note
Keychain
Well, that was easy. Guest user logged out. Thank you! Now to reset administrator passwaord....
Sorry for my ignorance, but I don't think the user password is the same as the administrator password.
Also, what is a keychain password?
Green box.
Click in the box under "Select the user account".
Select your administrator account.
A user can be an "Administrator".
OS X keeps all passwords in an application/utility called Keychain Access
for easy management of various passwords.
Best.
how do I log out a guest user?
