I've known for a while that OS X does most of its maintenance at around 2am. Unfortunately, my mac is asleep at that time. So, I'm faced with a problem. Should I leave my mac on all night, or ignore this "maintenance" as it's called? I've looked at stuff like MacJanitor, but is this necessary? If I don't allow this maintenance, will my mac start fooling around in the future? Your input would be appreciated.