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mini-morty Level 1 Level 1

Hey Guys,


a few minutes ago I installed Lion on my late 2009 MacBook (white) an rebooted as part of the installation process.

I noticed that, even when I am not doing anything, the CPU temperature rises up to 85°C, which should not happen!


Has anyone else encountered this problem or knows how to fix the issue?


Currently I am running SMC FanControl at 6200 rpm, which gets my temperature down to nearly 65°C, also not that good.



MacBook, Mac OS X (10.7), late 2009 MacBook
  • kiko stel Level 1 Level 1

    I'm having the same problem with my MacBook Pro 17 ",mid-2009. 2.8 GHz Intel Core 2 Duo, 4 GB DDR3 1067 MHz. 256MB NVIDIA GeForce 9400M.

    And the battery is not lasting the same as before with 10.6.8.

    What can I do? Somebody help us, because I heard that many users are having the same issues.

  • i hate "No Service" Level 1 Level 1

    i having the same problem. after installing lion on my 2010-MBA 11inch. the fan speed just wont get down below 2000rpm.. and CPU temps is 10' more than before upgrading.

  • Stefan722 Level 1 Level 1

    I'm having the exact same problem with my 2011 Macbook Pro, 2,3 Ghz Core i5. CPU temp goes up to 89°C, it cools down when the fan speed is over 6000 RPM. It happens allmost every 5 minutes, even when the CPU is 80% idle. Since the upgrade to OS X Lion the CPU is allways over 50°C, before the upgrade it was normally 35°C.

  • XRogue101789 Level 1 Level 1

    I have a mid-2007 black MacBook running 2GB of RAM, and I havn't been able to get my processor under 140 degrees. I think this is Apple's "subtle" way to tell us to upgrade to new machines lol.


    But in all likelihood it is just an OS issue that they didn't catch/completely fix in testing. I'm expecting to see an update fixing this soon. Hopefully it will work better than the Flash fixes.

  • Cerulean.Blue Level 1 Level 1

    Same problem with my aluminum Macbook Core 2 Duo.


    Firefox (latest version 5.0.1) seems partiuclarly to peg the CPU, even after webpages have finished loading (and it doesn't seem to matter whether the pages have Flash on them or not for me).

    Killing Firefox sometimes eliminates what seems to be the culprit, but other times not.


    I think I'll avoid using Firefox until a fix is out there (for either it or Lion)

  • hp12c Level 1 Level 1

    Red hot here too... Related to Spotlight indexing?

  • XRogue101789 Level 1 Level 1

    At least for me, the problem continues after Spotlight indexing. All 3 of my browsers (Safari, Firefox, and Chrome) all do a number on the processor as well, adding to the overheating issue, even on non-Flash sites.

  • hp12c Level 1 Level 1

    Figured my problem out: Carbonite.

  • mini-morty Level 1 Level 1

    When I experienced the problem, I had no open programs and checked my running tasks, none of them was going crazy and taking that much CPU-Power to explain the heat.

    How long would the Spotlight indexing take, maybe this is the solution.


    @ hp12c:

    What do you mean by that, could you solve the issue?

  • hp12c Level 1 Level 1

    My guess is that Carbonite isn't yet fully compatible with Lion. Once I uninstalled Carbonite, my computer settled down and runs normally.

  • cmp Level 1 Level 1

    Same observation here. After installing Lion on a mid-2010 13'' MacBook Pro, it starts to heat up with no apparent reason (no applications in use, no networking activities), bringing the fan - which had been completely imperceptible until yesterday - to quite noisy levels. The back of the device gets extremely hot. This continues to happen even after the initial Spotlight re-indexing has completed. If this continues, the laptop cannot be used as such anymore.

  • Ccassel Level 1 Level 1

    I have the same issue, my temp is going as high as 88C fan 6000RPM


    Anyone knows how to resolve this issue?
    I have a macbook pro i7 8Gb ram 2010 model.



  • cmallow Level 1 Level 1

    Same problem on a new 15' Macbook Pro with a 2.2, i7 and 8GB of memory. Nothing is running either.

  • mini-morty Level 1 Level 1

    Hearing this, I consider myself lucky, the issue resolved itself, somehow...

    I just let my MacBook work for some time, rebooted and the temperature went normal. Afterwards Safari was running very slowly but this also improved back to normal and by now I have a temperature of 50°C running Youtube in Safari smoothly and everything is fine.


    I guess the whole issue has something to do with the indexing processes of Spotlight and other programs, like someone mentioned before, I have no other explanation.

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