Hi guys can anyone help me out? I've just bought a MacBook Pro from a friend (running 10.13.6.)
The user name and password were set to User and password
I wanted to update the user name but when doing this the Mac hung and now neither old or new password can not be used when installing software.
When I turn on and login the old password is accepted (User / password) however when trying to installing neither new or old are accepted and I can not install anything.
Any thoughts how I can fix this?