Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Mac OS X Lion heats up my MacBook extremely

Hey Guys,


a few minutes ago I installed Lion on my late 2009 MacBook (white) an rebooted as part of the installation process.

I noticed that, even when I am not doing anything, the CPU temperature rises up to 85°C, which should not happen!


Has anyone else encountered this problem or knows how to fix the issue?


Currently I am running SMC FanControl at 6200 rpm, which gets my temperature down to nearly 65°C, also not that good.


Thanks!

MacBook, Mac OS X (10.7), late 2009 MacBook

Posted on Jul 20, 2011 2:50 PM

Reply
60 replies

Jul 20, 2011 6:58 PM in response to mini-morty

I have a mid-2007 black MacBook running 2GB of RAM, and I havn't been able to get my processor under 140 degrees. I think this is Apple's "subtle" way to tell us to upgrade to new machines lol.


But in all likelihood it is just an OS issue that they didn't catch/completely fix in testing. I'm expecting to see an update fixing this soon. Hopefully it will work better than the Flash fixes.

Jul 20, 2011 7:39 PM in response to mini-morty

Same problem with my aluminum Macbook Core 2 Duo.


Firefox (latest version 5.0.1) seems partiuclarly to peg the CPU, even after webpages have finished loading (and it doesn't seem to matter whether the pages have Flash on them or not for me).

Killing Firefox sometimes eliminates what seems to be the culprit, but other times not.


I think I'll avoid using Firefox until a fix is out there (for either it or Lion)

Jul 21, 2011 6:52 AM in response to mini-morty

Same observation here. After installing Lion on a mid-2010 13'' MacBook Pro, it starts to heat up with no apparent reason (no applications in use, no networking activities), bringing the fan - which had been completely imperceptible until yesterday - to quite noisy levels. The back of the device gets extremely hot. This continues to happen even after the initial Spotlight re-indexing has completed. If this continues, the laptop cannot be used as such anymore.

Jul 21, 2011 7:44 AM in response to cmallow

Hearing this, I consider myself lucky, the issue resolved itself, somehow...

I just let my MacBook work for some time, rebooted and the temperature went normal. Afterwards Safari was running very slowly but this also improved back to normal and by now I have a temperature of 50°C running Youtube in Safari smoothly and everything is fine.


I guess the whole issue has something to do with the indexing processes of Spotlight and other programs, like someone mentioned before, I have no other explanation.

Mac OS X Lion heats up my MacBook extremely

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple ID.