My iMac is heating up to the point that it is hanging. Yesterday I could not even boot up. I got the folder icon with the flashing question mark. I tried using Disk Warrior, and the program didn't even see my hard drive. I powered it off and waited until the computer cooled off. I then could boot it up to the login screen. But only got the spinning beach ball. I powered it off and waited even longer. Then I was able to restart it and log on all the way. But then it heated up again overnight, and it the system was hung in the morning. The system was idle all night and the screen saver was active when I came in this morning.
I work in SQA for a tech company. After checking around, I found out there were two other system that hit the same problem.
Prior to putting Lion on my system, I had no trouble with over heating.
Folks need to be very careful. Prolonged exposure to overheating can ruin your computers.
Despite advice to the contary, I would definately monitor your temperature and fan activity. Apple may find a fix for this issue eventually, but I'm betting that they won't replace or repair your fried computer for free.
I think I have finally fixed the heat and fan issue on my MacBook Air following some advise I found on another forum. It seems to be (at least for some of us) related to a corrupted Safari cache file.
Here the steps to fix it:
- Close Safari
- Delete the "cache.db" file in (username)/library/caches/com.apple.safari
- reopen Safari
The temperature on my machine dropped almost instantly from more than 70 celsius to around 55 and the fan noise stopped as well.
I'm on the second day after fixing it now, and so far still everything ok.
Hope this helps others as well
I had the same problems (running hot, quick battery drain) on my early 2008 15" MBP since upgrading to Lion about a week ago. I checked the activity monitor and found the VirusScan program was using 97% of the processor time. I disabled the on access scan function and everything went back to normal. No problems since. I'm guessing Lion has some problem with the VirusScan app and kept the HD spinning.
i had the some overheating problem with my new mbp after installing Lion
after a lot of research, i have found something that has sorted it out
seems that the automatic switching of graphic cards no longer works properly - have found a temporary solution by installing gfxCardStatus and switching it manually to 'Integrated' rather than the discreet graphics card
It has definitely worked for me, machine no longer overheats and i dont hear the fan anymore
Hope this helps others out there
I hope it will be good for everyone..
I just came back from Apple Service Center because of my MacBook Pro made big fan noise.
And they found out that my Mac was overheat. The temperature was 87 C and the fan was 6144rpm.
The guy suggested me to leave my Mac for observation. I refused because my whole works are in it and I work almost 24/7 with it.
And I saw this forum.
I did what bbrip suggested by deleting cache.db and the temperature was changed to 85 C.
Then I did what keg55 suggested by resetting the SMC.
Now the temperature is 50 C and the fan is 1999 rpm.
Thanks keg55 and bbrip..
Just saw this thread and thought I'd chime in (many months too late, but why not?).
I have had identical issues with my MBP 13' (early 2011). I've tried virtually everything in this thread, including taking it to the Apple Genius. I also didn't want to leave it there so they could reinstall the OS.
Here's what I found, and perhaps it's a one-off: Despite Carbonite NOT showing up as taking virtually any CPU power in my Activity Monitor, it turned out to be the culprit. As you might imagine, out of frustration I started unloading and turning off everything. As soon as I disabled Carbonite (the online backup service), voila! my MBP has been cool and perfect. No more racing fan up and down seemingly without reason. It's been great for many days now, and I have put everything back like it was (except for Carbonite).
Hope this is helpful to at least one person somewhere!
Hello, first, excuse me for my english
I had the same problem about the high temps in mi 13'' Macbook Pro, I usually didn't care about it thinking that the engineers knew what they were doing like the fanboy up there said, but after some time my hard drive started to fail and I got stuck at the spinning gray ball at the start up, I wasn't able to turn on my Mac for a week, I knew that if I had consulted the genius bar they would charge me houndreds of dollars so I decided to open it up and see where the problem was.
Apparently, the problem is the Flex Cable, it seemed that after a heat up the cable circuits had been erased even if the cable seemed perfect at first sight, finally I got one for $30 and I haven't had a problem since there, I was really happy that the problem didn't involve the HD.
Hope this helps and try to keep your Mac in a ventilated place, that way even if it heats up it doesn't mess up the internal components. Also if you are out of warranty locate the problem and replace that part.