Hi there, If anyone could help me with this it would be much appreciated. I am running OS X 10.8.2 (mountain lion) on a 3.1 GHz iMac 4gb memory. I have noticed, since upgrading to mountain lion really, that randomly the computer will go glitchy when playing sound from any source. For example, it'll suddenly go all intermittent and noisy in the background with the sound. It is hard to explain, sounds kind of like a radio station half out of signal. It'll continue for any determined amount of time, and then it may fix and go back to normal. It's always without warning, I can be not even touching the Mac and it will happen. Twice it has just restarted by itself saying that "iMac restarted due to a problem". Anyone have any ideas? Thanks.