Now erase the disk normally, using the standard erase option. Select Unlock “volume name” from the File menu. After that, locate and uncheck 'User must enter a username and password to use the computer'.
It starts the loading bar and halfway through it shuts down. I have a A1278 MacBook Pro that is shutting down after you enter password for account.Hold down the on/off button for about 5 seconds.
Earlier MacBooks with a removable battery. After it shuts down, press and hold the on/off button.
