I have new 2015 macbook and it has now, twice, shut down on me without any warning/notices. I have lost some work, but nothing that i could not recover from personal memory (my own that is). Any ideas? I have reset the SMC and hope that will fix, but since it has only been twice, not sure when it will happen again. It will be at least a week before I can get an app with Apple store to look at. Any help appreciated. edit: I was using Mac Office Word 2011 when it shut down. The first time, I cannot remember, I think ti was just Internet usage.