Hi, the other night my macbook pro (15 inch, late 2011) started acting strange after I had updated to 10.10.5. Since then: Freezing when I tried to do anything at all (beachball) Slow restarts (freezes at about 50%) Since then I tried booting back up in Yosemite, update to El Capitan, but nothing seems to work. I've been able to boot in safe mode and do limited work like this. I'm about to send it away for support, but am worried this is a logic board problem, which I can't afford to fix. My question is, does the fact that I'm still able to boot into safe mode mean that it's not a logic board issue? Thanks in advance.