or El Cap) Screen is gray with apple and progress bar at about 7/8ths. Tried restarting but does nothing else. Was on ALL night. Now showing spinning beach ball. HELP. I need to teach today!!!!! MacBook Pro 13" Oct 2011? SN C17GH3X8DV13 2.14 GHz Intel 15
MacBook Pro (13-inch Mid 2012), Mac OS X (10.7.5)
