Used iMac Question
My brother works for a moving crew, today found a used iMac that someone had left out that they didnt want anymore. (The crew is really supposed to take it to the surplus place but the head mover said he could have it). So he took the computer home and turned it on and it says he needs a user name and password to start it up. Can anyone help with a way to clear this, and log on to the computer?