Chosen Solution
system sleeps randomly, and system log shows the following message, “powermanagement emergency overtemp signal. going to sleep”
I’d reset the PMU and PRAM to see if that makes any difference. I’m sure you’ve looked at your sleep settings, but if not, I’d take a look there and see if the machine is falling asleep when it’s set to, or at a different time. It doesn’t seem there’s a definitive answer to the problem, but here’s an interesting thread on the issue: http://archive.macfixitforums.com/ubbthr…
