Got an interesting one. We have a macbook air - mid 2012 that is freezing randomly. When i say freezing i mean the track pad stops working and the keyboard stops working, although the power off button still allows us to turn it off. There seems to be no logic to when this lockup will happen, no set time - it just happens. I've tried all the usual suspects like pram reset, disk repair etc.. No here's the strange bit, i wiped it yesterday and it locked up within the recovery screens. I'm truly stumped and appreciate any insight you guys might have on this weird one..