MacBook Pro (15" late 2011 OX Yeosmity with latest update) my MacBook restarted on its own with a blank grey screen manually shut down and then turned back and logged in start up was about 50% then halt
Macbook Pro (15" late 2011 OX Yeosmity with latest update) restarted and had a blank gray screen shut down and restarted logged in. When it went to the startup the status bar went 50% then halted. I have already done a dianostic and no hardware problems, don't know wat else to do?
MacBook Pro (15-inch Late 2011), OS X Yosemite (10.10.4)
