3 Replies Latest reply: Dec 9, 2012 3:20 AM by clintonfrombirmingham
sarasobbel Level 1 (0 points)

my macbook pro (with retina) has stalled whilst installing an update of mountain lion, the blue bar has stopped progressing, it has frozen and hasn't moved, I can't cancel the installation, I can't shutdown the computer, can't restart it, nothing...help!

MacBook Pro (Retina, Mid 2012), OS X Mountain Lion (10.8.2)