Mac OS X Lion heats up my MacBook extremely

Hi all,

The best way is to check on "Activity Monitor" and you change from "My Processes" to "All Processes" on the drop down to see what it could be using your CPU and from there I think it would be a lot easier to find the root of the problem.

Mine was just a fsck_hfs trying to fix my external "Time Machine" HD.

Thanks,

Same Here - I have a MBP 15" early 2011 and having the same issue. CPU fan going crazy and overheating. Opened a case with Apple and they suggested to wipe and re-install which I tried but did not fix the issue. I guess it's a wait and see...

This fixed my problem.

https://discussions.apple.com/thread/3191543?tstart=0

I had the same heat/performance problem today with my Mac Book Pro 13" Early 2009. Installed Lion yesterday. Spotlight indexing was successfully done yesterday. Today there were only iTunes on standby, Mac App Store and some Finder windows open.. Internet did work all the time withour any problems.

Mac Book Pro 15" Mid 2009. Heats up a little more than it used to. I have smsFanControl running permanently, so I always know the temperature. When system is idle, i.e. CPU is under 5-10%, on Snow Leopard temperature used to be less than 50°C and, thus, fan speed was only 2000rpm. Now after upgrade to Lion temperature is 60°C and fan works at 3000rpm. Even when Activity Monitor or top show CPU to be around 3%. Maybe it is not that critical as other problems reported here, but still disappointing. Is there anyone having the similar behavior?

Solved mine too!

MacBook PRO 15 2009, i had citrix installed!

Thanks!

That's right. It's happening to mine also - Macbook Pro 2010. It heats up 10 more degrees on mine even when I'm only running Safari and so far nothing really semm to fix the problem here. Hopefully there will be a significant update soon.

I keep looking for why the fans scream and cpu heat is way up. TechToolPro Daemon was one but it is back now with mds (spotlight). What else are people seeing. No Citrix here.

I have the same problem. Since I installed Lion my MacBookPro (intel core 2 duo) really heats up. I never had this issue when I was running Snow Leopard. In addition, Chrome als runs very slow on some occasions.

The problem for many people seems to be Citrix, so check out cmallow's post up above.

But it seems for many of us that the base operating system just runs warm (about 10 degrees F). So far I have found that the only way to keep the temperature down is to keep the multitasking to a minimum, as well as frequently quitting and restarting your web browsers (Chrome, Firefox, and Safari all run murder on my processor now). I've read that it has to do with WebKit2 or something and each tab running as a different process, etc etc... Also, avoiding flash, but HTML5 videos seem to be ok for now)

Has anyone gotten any info from a Genius or Apple Tech Support? I would call, but I'm out of warranty.

From Spain, my macbook white 2010 since i installed Lion it´s very hot to

I was experiencing this with my Mac (2.4GHz Intel Core 2 Duo, 8GB, Unibody MBP) too but I found that resetting the SMC solved the issue - so far anyhow. Now it runs at normal temperature. See this article on how to reset your System Management Controller: http://support.apple.com/kb/ht3964

dear raj,

i try to reset the SMC. but the LED on the MagSafe power adapter didnt change states or temporarily turn off. how can i know the SMC reset is successful?

If you have MS Office for Mac installed, please read the linked article:

http://reviews.cnet.com/8301-13727_7-20023166-263.html

Removing the MS Office Spotlight plug-in fixed it for me.

I have same problem. The culprit is Firefox (even the latest version 5.0.1).

Activity Monitor shows that Firefox is utilizing 99-100% fo the CPU.

The CPU util, fan, etc. calm down immediately as soon as I close Firefox.

So, I moved all my bookmarks over to Chrome and am avoiding Firefox right now until they have a fix.

BTW, I don't know what the deal is with Firefox. We had major problem when they upgraded to 4.0. We gave it up for a while and just came back to it a month ago. Upgrade to Lion and experienced this problem. Upgraded FF to 5.0.1 and it doesn't help.

Chrome and Safari works perfectly fine with Lion.