upgraded to Mountain Lion fan is constantly running

Same here - early 2011 iMac 28" - fans running full speed ALL day.

Same with me, except I have a late 2010 MacBookAir. Fans build up to full speed in just a short time. It was not like this before. I am barely running anything (Chrome!).

Same over here ...... also battery power is dropping like crazy

Hardware Overview:

Model Name: MacBook Pro

Model Identifier: MacBookPro8,3

Processor Name: Intel Core i7

Processor Speed: 2.2 GHz

Number of Processors: 1

Total Number of Cores: 4

L2 Cache (per Core): 256 KB

L3 Cache: 6 MB

Memory: 16 GB

Boot ROM Version: MBP81.0047.B27

SMC Version (system): 1.70f5

Serial Number (system): C02F953QDF92

Hardware UUID: 329DED4A-8A5B-5AB1-B3F8-00BE36BE7CE7

Sudden Motion Sensor:

State: Enabled

The view you provide only includes your processes. In Application Monitor, choose All Processes, sorted by decreasing CPU% (click on the columne label a few times), and click on CPU on the bottom bar to show the totals for CPU. Post back and someone may have some ideas.

PS It is normal for the system to be busy for awhile after an installation, e.g. reindexing your data. But it should settle down after awhile.

Nope. Been like this for 18 hours now. Indexing is complete. This is a bug.

If you run Application Monitor, choose All Processes, and sort by CPU%, what are the processes over 10%? Any what are your CPU totals for system, user, idle? This may help identify the problem.

None, all are 3% or under.

I've got the same problem with my Imac 27 Late 2009 and it appeared just after the upgrade, no worry before...

Thank you.

Non over 10% en cpu %idle = 85 , fans still running

It's Chrome (actually almost any Google software) as they install a root auto-update background process that's a pain to uninstall as any of the Google software just reinstalls it.

This problem has appeared before here.

but it’s safe to assume that a Mac version of Google’s Chrome Browser will likely use the same update policy and that could hurt the browser’s ability to entice users into switching.

http://www.wired.com/business/2009/02/why-googles-sof/

http://arstechnica.com/apple/2009/01/google-software-update-refuses-to-be-uninst alled/

http://wireload.net/products/guu-google-update-uninstaller/

Of course not to mention that Google is recording everything your doing and doing who knows what with the data, at least with ISP recording a warrant has to be issued.

inkster - Top usage 3% and constant fans does sound like a problem. (I'm assuming you don't have 100 such processes going at once.) Try an SMC reset if you haven't already. If you are still under warranty, call Apple Care, or take it in to an Apple Store or AASP.

mr da, it seems that 's not an hardware problem. We' ve all got the same problem during the same time.

It's sounds like a bug with Mountain Lion. 98% free and my fans make noise.

Thanks.

You're right - 98% idle and fans going full blast doesn't sound right. See my comments to inskter above.

Same here with a late 2011 MBP 13''.

Since yesterday (after Mountain Lion upgrade) 97% idle, fan runs at 2000 rpm (and more) all the time.

Indexing is done and SMC reset didn´t help.

Temps are normal ( < 50° C ).

Hope Apple fixes this soon.

I was experiencing the same problem. For me, ReportCrash was running at 120%+.

Disabling it with this command has helped. I'm not sure of the other repercussions, though.

sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.ReportCrash.Root.plist