View Full Version : suddenly I hear the fan

20th December 2012, 09:49 AM
Hi all - wondering if there is any (scary) reason that my MBP 15" has suddenly decided to run hot, or run the fan with more vigour, or - perhaps - just doesn't like the Cairns weather? I have never heard the fan before, in 16 months. Downloaded Mackeeper but didn't bother to buy it.......nothing else happening worth noting, just this sudden urge to fan itself.


20th December 2012, 09:58 AM
Have you restarted your computer recently?

Can you open activity monitor (found in Applications -> Utilities) and then sort by CPU like my screenshot below and tell me whether what the highest CPU usage is. Chances are it is something like Flash causing the cpu to work hard, resulting in a hotter CPU meaning the fans turn on to try and cool it a little.


20th December 2012, 10:09 AM
Mackeeper is evil! EEEEEEvil! :)
I don't know if it's related to the fan, or making the CPU work harder, but I'd get rid of it regardless...
MacKeeper, a rather slimy tale | TheMacFeed Records (http://themacfeed.com/2011/06/mackeeper-a-rather-slimy-tale/)

It's a bugger to get rid of (this article walks through how... how to uninstall MacKeeper updated Phil Stokes (http://applehelpwriter.com/2011/09/21/how-to-uninstall-mackeeper-malware/))

20th December 2012, 10:28 AM
On a more basic level, the fans might also be full of dust. You can get cans of compressed air from electronics stores to blast out any crud in and around the fan and vents.

20th December 2012, 10:54 AM
ok looks like skype might be the culprit - can't quite figure out in a hurry how to insert the screenshot but skype is running at round 180, which also confuses me since I thought - silly me - that we could only have 100%. Others are iphoto and photoshop and itunes.....but I'll do a restart too, get rid of Mackeeper, and search out a can of compressed air as well if the problem persists.
Thank you, people, for being so helpful. Skype is now going to bed for a few days :-)

20th December 2012, 11:44 AM
Skype is a killer. As for the 180% it's 100% per core so it's likely you have a dual core processor meaning you can have up to 200% and beyond if the CPUs have turbo-boost enabled.

I was once called to a PC that couldn't open Firefox because Skype was chewing up all the CPU. Quit it, told it never to open on start-up, said computer has been running perfectly for 2 years.

I believe things have been fixed a little on the latest versions of Skype, might be worth checking out whether you have the latest version. It sounds like part of the program got caught in an endless loop for whatever reason, each time it would consume more CPU until eventually it ran out of resources.

To upload a screenshot, use imgur.com

20th December 2012, 11:56 AM
and the MBP is now as quiet as a mouse. Thanks once again, Merry Christmas!!

20th December 2012, 04:40 PM
Thanks I had the exact same symptoms :-)