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rMBP Fans Randomly Get Loud?

889 Views 9 Replies Latest reply: Mar 12, 2013 5:11 PM by DevNode RSS
vRug Calculating status...
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Dec 29, 2012 9:53 PM

My Retina Macbook Pro's fans randomly are getting loud for no reason. I could just be browsing the web on facebook or something, and it'd do this. This has just started maybe an hour ago (12am). I have documented it on video and uploaded it to youtube ( This has happened on average about once every 5-10 minutes (is happening right now, 12:43am). I've monitored the CPU Usage for a while no, and I've seen safari peak up to 102%+ usage and the fans didn't kick in so I don't know what is happening.. Also, as a side note, I did change a couple of the settings for the computer sleep timer because I'm downloading Ted the movie in iTunes. The temperatures are all good right now ( Is this something that I should be worried about or is this normal? Is the extensive download what is causing this? This is my first macbook/any mac that I've owned (not used) and I'm kind of worried.. ):

MacBook Pro with Retina display, OS X Mountain Lion (10.8.2)
  • clintonfrombirmingham Level 7 Level 7 (26,745 points)
    Currently Being Moderated
    Dec 29, 2012 10:14 PM (in response to vRug)

    Use the 14-day free trial of iStat Menus 4 to see just how hot your rMBP is running when the fans kick in high gear. Also not your fan speeds at the time. Safari should not be running at 102% CPU usage - 17% or so is more like it.


    Report back with temps, fans speeds, and Activity Monitor reports...



  • bames Calculating status...
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    Jan 4, 2013 8:28 AM (in response to vRug)

    Try doing an SMC reset. It worked for me when expereincing these same problems.

  • jpad1208 Calculating status...
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    Feb 18, 2013 11:17 AM (in response to bames)

    Has it happened to you again after doing the SMC reset?

  • jpad1208 Level 1 Level 1 (0 points)
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    Feb 18, 2013 11:17 AM (in response to vRug)

    Did You ever get it fixed?

  • bames Level 1 Level 1 (0 points)
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    Feb 18, 2013 11:28 AM (in response to jpad1208)

    No it eventually came back. I took it to the Genius Bar his weekend and they identified a bad temperature sensor on the logic board. They are replacing the logic board along with the fans since they were spinning so fast so often. My machine based their hardware test so I left it with them for them to look more at the problem. After a day they called and told me of the sensor problems. They said the repairs would be done by tomorrow since they were waiting for parts. Hope this helps.

  • DevNode Calculating status...
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    Mar 12, 2013 5:11 PM (in response to vRug)

    My rMBP (Feb 2013) is also having this issue. I recently reproduced it, though it took half an hour. I used activity monitor to see if any processes were going nuts. Nothing. The fans were at full rpm for a minute while the  CPU was 95.54% idle. This is not right. I do not believe it is the SSD either because people with both samsung and sandisk SSD'd have been having this issue. Apple need to address this or at least give the people affected some sort of acknowledgement. As I am writing this the fans just went full blast again... Please fix this Apple, this is very annoying and I bet you would hate to have to refund 2700$. It is not just me many others are affected, even one reprodeuced it in this video:   


    And for the people who say doing a smc reset or a pram reset will resolve this.... You are wrong. It was not resolved on either attempt. Fans just spun up again... Good god annoying. Please Fix this or even acknowledge us!


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