Have a friend who just bought a brand new MacBook (the black one). After just a week of use, it refuses to shut down. It will go into sleep when the lid is closed but it won't restart or shut down. When a shut down is attempted, it displays a message that the session has timed out and the program (usually the Finder) failed to quit.
Any ideas on what could be causing this???
Any ideas on what could be causing this???