How to delete an administrator account on mac? I have an administrator account on my mac I don't need, and know the password but cannot delete it.
Go to System Preferences > Users &amp; Grops > unlock padlock > click in + > Create a new Administrator Account.

Now, you can delete the other Administrator account. 

Close actual Session > Open session with the new Admin account > Go to System Preferences > Users &amp; Groups > unlock padlock >select old Admin Account > click in -