MacBook won't come out of sleep mode.
My MacBook freezes every time I try to wake it after I put it in sleep mode. I have to restart my computer to get anything to work. I upgraded from Snow Leopard to Mountain Lion 10.8.2 and never had a problem before. Are there any fixes to this, other than never putting my MacBook to sleep.
MacBook, OS X Mountain Lion (10.8.2)