Have you had any of your Mac's exhaust fans just start running as fast as they could along with a processor that you could cook eggs on? While at idle/fresh reboot/restart?
My MacBook experienced this phenomena and it stuck with it - almost to the point of making me reload the OS.
I did a quick Google search and found that the PMU (Power Management Unit) gets goofy and can make the fans run at top speed, which is about 6800rpm, average at idle is 1800rpm.
As I explained to a friend, Mac's will do their suspend/reanimation with no problems - it works and is more than you can say for its Windows counterpart which will constantly hang, memory exceptions, application failures, lockups - you just have to reboot after suspending much with Windows - but Mac works, you just have to reset its brain once in a while...
While this was going on, it also made my CPU heat up as hot as it could get - thus turning the fans on in my presumption, but resetting the PMU fixed all the issues I had hat hand.
To reset the PMU in the newer MacBooks, just remove the battery/ac adapter and hold the power button down for 5-10 seconds. The second step (which wasn't listed for MacBooks) was to hold Option+Command+P+R and hit the power button (with batter/ac attached) - it will reboot twice and hopefully all will be good to go.
Heres the Apple Doc I read/used:
Apple - http://support.apple.com/kb/HT1411
Monday, September 1, 2008
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