MacbookPro early 2011 Running OS X Yosemite 10.10.1 Hi all I've had my laptop since 2011 and have not had any problems until today. Monday I upgraded the 4gb or ram to 8gb. It has been working fine. However today it just started shutting down out of nowhere. I ran the hardware diagnostics (d) on startup and it said no errors. Everytime I turn it back on I get anywhere between a minute and 10 mins before it does it again. I finally booted into safe mode to be able to look around. It has been an hour and it hasn't turned off which leads me to believe it is a software issue?? I'm really not sure what to check. I don't recall downloading any new software lately. Any ideas?