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10.7 Lion makes the fan in my MacBook Pro roar!

12630 Views 37 Replies Latest reply: Dec 4, 2011 2:34 PM by JonSMacPro RSS
  • DS FTL Calculating status...
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    Aug 21, 2011 2:57 PM (in response to oldblueday)

    I followed the steps and initially it resolved the fan running.  After a couple of hours it started again.  Sometimes it is louder than others.  Like others, it is really taking a hit on the battery cycle.


    How is this going to be addressed with battery cycle counts?  Any other apple resolve?

  • guerrilla*style Calculating status...
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    Sep 15, 2011 5:18 AM (in response to Andre Klein)

    My Issue seems to stem from Safari and the Flash plug-in…I checked my activity monitor and Flash was using 136+% of the CPU. I quit ot of Safari and the fans are running at a whisper…I also istalled the Flash Blocking extensions in both Safari and Firefox that where listed earlier…

  • fraeulein Level 1 Level 1 (0 points)
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    Nov 12, 2011 7:57 AM (in response to oldblueday)

    Worked perfectly for me.  Thank you.

  • jan293 Level 1 Level 1 (0 points)
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    Nov 17, 2011 6:15 AM (in response to mahbool)

    Wow, that helped! (the CAG plugin) Thanks!

  • lucian_ Calculating status...
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    Nov 22, 2011 8:08 AM (in response to Andre Klein)

    I had the same problem Mac late 2010, 2.13 Intel core duo 4GB RAM 2

    Lion was installed as update.

    as result:

    CPU on 80 °C and to keep it between 70 and 80 °C fan had to work on 6500 RPM.
    I used Istat.

    repaired permissions, no result, reset the SMC and so on... no results.

    lately reading also other posts, I started to disable 1 by 1 the start up items.

    the antivirus Sophos +  the time machine auto back up -on off was quite successful

    now I have a 4000 RPM = quite decent as noise level and CPU at 40-47 °C.

    had nothing to do with the flash or browsing, mai land so on.
    Spotlight, yess is pushing the temp up, but is not running 24/7

    Check your startup items, the answer can be there

    Maybe helps

    Good luck!


  • pdjhh Calculating status...
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    Nov 28, 2011 2:51 AM (in response to lucian_)

    I have to agree, I wish I'd jave waited. Actually good I'm reading this though because I was kind of thinking it might be because my macbook is a few years old and can't hack it. If I'd have bought a new one and still got the fan crankin I would have been annoyed. Will wait for further releases I'd say. I gues no one who hasn't yet upgraded would be reading this, if you are ( which you aren't ) don't upgrade yet I'd suggest.

  • JonSMacPro Calculating status...

    Here is some additional information after I reset my SMC.  I am running on a Macbook Pro 2.1.  Resetting the SMC seemed to have helped a bit since it used to be especially bad after just leaving the machine for a while and it going to sleep.


    Now I notice it even when just using the machine with email.  I was not running safari at the time I noticed the problem again.  The AddressBookSourceSync and System Preferences apps are running at between 60 and 70 % each which is my my CPU temp is very high.  I have seen it in the 170s and it has never been that high before.  I am afraid of what running it this hot for a long time will do.


    I quit the System Preferences app that I had running and that helped, but the AddressBookSourceSync is just out of control, exceeding more than 70% and I think it should have finished its major work when I moved to iCloud yesterday.



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