I've heard a few cases where a MacBook (when shut down) will turn itself on, often in the middle of the night or at certain times. I shut mine down nightly (unplugged), and usually don't leave it on (in sleep mode) for long periods of time (longest time was 3 days, recently). It's not used to being on that long, so could the 3 days have messed it up? I just wonder if it's possible for mine to turn itself on in the night, and somehow overheat and cause fire? If it helps, I have a Macbook Pro (2010). I've heard of a few rare cases of that; what's the likelihood of that happening, or it even turning itself on? I know I'm probably way overthinking things, but maybe someone can put things into perspective. Thanks.