The Lion overheating loop

Discussion in 'Mac OS X Lion (10.7)' started by andymac2210, Jul 30, 2011.

  1. andymac2210 macrumors regular

    Jul 18, 2011
    So activity monitor wouldn't even tell me what was using my CPU (2010, 13" MPB), but yet my computer kept getting hotter and hotter.

    I tried to close all apps, I tried to log out and change user, eventually I had to do a restart.

    It was topping out at 80*C with then fan at 4000rpm and NOTHING going on.
    I have never had this program with my mac before, it's got to be lions fault.
    And it appeared to start out of nowhere, not even doing intensive stuff.

  2. avdb12, Aug 3, 2011
    Last edited: Aug 3, 2011

    avdb12 macrumors newbie

    Aug 3, 2011
    Antwerp, Belgium
    Also really disappointed

    I have the same problem.

    After I installed Lion from the AppStore My 2010 MBP 15" is slow, using a lot of CPU and really overheating when I just use Mail, Safari and Ichat if I close them and there are no applications running the CPU is still using maximum the capacity and hot.....

    Today I backup all my files and hope that I can do a clean install to downgrade back to snow leopard!

    Also really disappointed!
  3. stillmatic macrumors member

    Apr 27, 2010
    People are goddamn liars if they won't admit Lion runs hotter than SL.

    I've done a clean install, barely any apps and have this issue.

    I'm also sick and tired of people talking about how stable Lion is compared to SL. Yeah, tell that to me when I was applying on a job application and lost everything cause I got the Grey Screen of Death right at the end of it.

    I use to ALWAYS use my notebook on my lap, but now with Lion, it's unbearable.
  4. jpeezy macrumors regular

    Feb 24, 2010
    When you upgrade, there is a process (mds) that indexes all of your files. This process can take quite a while to complete. Depending on how many files you have, it can take 30+ minutes. mds will cause your CPU to go nuts, which will in turn drive your temperatures up.

    Next time, please search before posting.
  5. stillmatic macrumors member

    Apr 27, 2010
    ^Load of **** on why he's having that issue. Clean installed with barely any files and I have that issue well over a week later. Love how everyone tries to justify Lion running too hot and buggy.
  6. tom5304 macrumors regular

    May 7, 2005
    It us you, sir (or ma'am :D) who needs to do the searching.

    Lion is a buggy mess. Maybe not for you, but it is for many.

    Lion runs hotter, uses ridiculous amounts of memory, and has broken Wifi for many of us.

    And those are just some of the problems.
  7. avdb12 macrumors newbie

    Aug 3, 2011
    Antwerp, Belgium
    It is understandable that during the "upgrade" from snow leopard to Lion that the CPU have to work hard to get the job done. However like stillmatic it is also for me more than week later and the issues we now experience with the overheating and the CPU using nearly all capacity is not due the upgrade process but to a fault/bug in Lion!

    I need my MBP for work and it nearly impossible to use it now!
  8. jpeezy macrumors regular

    Feb 24, 2010
    mds doesn't run during the upgrade, however, it does run all the time. Once the upgrade is complete and you've restarted, it starts indexing all of your files. The initial run will take the most time to complete.
  9. jpeezy macrumors regular

    Feb 24, 2010
    I will definitely disagree, if anything it runs cooler.
  10. bobnlyne macrumors member

    Jul 14, 2011
    San Antonio
    Must be nice to be the only Lion user that can say that. :(
  11. Icy1007 macrumors 65816


    Feb 26, 2011
    Cleveland, OH
    Wirelessly posted (iPhone 4: Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_5 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8L1 Safari/6533.18.5)

    Lion runs cooler for me. Idles in upper 30s and tops out in lower 80s when under max load.
  12. darkeartg macrumors regular

    Jan 27, 2011
    Agreed, my mbp is quite a bit warmer
  13. juzmacman macrumors newbie

    Aug 5, 2011
    Gold Coast
    Model specific overheating

    I've had Lion on 2 x 2011 MBP's with no issues, plus a 2011 Mac Mini without heat issues. Indexing activity aside after the initial installation, they run fine and I have no problems using my 17" on my lap - battery lasts 8 hours web browsing etc.
    I wonder if this issue is specific to certain models?
  14. madisonfaye macrumors regular


    Jul 7, 2011

    Mine is not running hotter at all, it actually feels cooler. I didn't record my exact temperatures before so I can't make a comparison, but my MBP is definitely not running hotter on Lion and I'm doing the same tasks.
  15. kuwisdelu macrumors 65816

    Jan 13, 2008
    I haven't noticed any difference one way or the other with my Lion install.

    For those whose is running hotter and saying their CPU is running at max: there must be some process associated with it. What is it?
  16. Bunker macrumors member

    Oct 28, 2007
    First few days after upgrade, Lion was crawling and turned on the heat. Spotlight was reindexing and time machine over the NAS was not stopping.

    After all those were completed, like one week later, things are getting a little better, but smoothness is not there like snow leopard.

    I am running 2009 MBP 5,5 13" with 2.53ghz C2D, 8GB ram and dual HDD.

    Delay in Finder displaying it's content is getting to annoying level.

    It does get hotter but that's because of firefox + flash.. Real killer for me. Hesitantly moved over to safari and things are a little cooler.

    Feels like Lion demands SSD kind of response from the HDD else you have to wait quite a bit after clicking on something.

    Natural scroll is ok to me, got used to it in couple days. However those delays are getting to me!!
  17. avdb12 macrumors newbie

    Aug 3, 2011
    Antwerp, Belgium
    Good question or better said that is the question! I use now only use Safari, Mail and iTunes and my MBP is running at the max... and CPU is around 80*.
    also the Activity monitor is not showing any odd applications running.
  18. basher macrumors 6502


    May 27, 2011
    Glendale, AZ USA
    Weird. I'm running 50c with safari, Xcode, and dreamweaver running. Guess I'm fortunate.
  19. Nuck81 macrumors regular

    Oct 15, 2009
    Western Kentucky
    I'm having no trouble with Heat after Lion.

    The only things that gets my fans running hard is games or watching videos/movies...
  20. podsorcerer09 macrumors regular

    Sep 9, 2008
    The real problem is people expecting a .0 release to work like a .8. You should know by now that having Lion installed is going to be buggy for some, I had a crash this morning and some smaller heat issues but not too bad. If it really is unbearable to you, go back to Snow Leopard and then upgrade again once we hit 10.7.1 or .2. Expecting a first release, regardless of how may developer previews were run, to be as stable as a more mature release is insane. I get that buggy wifi exists and is a wide spread issue, that alone is good enough reason to downgrade until it's fixed.
  21. tom5304 macrumors regular

    May 7, 2005
    Translation: We should expect Apple to release a buggy operating system that breaks several key functions on our computers. :eek:

    This makes no sense.
  22. Quad5Ny macrumors 6502a


    Sep 13, 2009
    New York, USA
    Developers do this all the time. If we had to wait for all the bugs to be worked out, Lion wouldn't have been released for another year.

    I'm sure the power management (heat) issue and WiFi will be worked out in the first point release. In the mean time try reseting the SMC and/or doing a clean install.

    Oh and my 2010 MacBook Air is running just fine on Lion (no bugs).
  23. OW22 macrumors 6502


    Sep 3, 2006
    Dublin, Ireland
    No heat difference here at all. Have iStats installed and the same temperatures in Lion I was getting in SL. Same CPU usage as well, currently using 5% of my CPU with multiple apps open and a youtube clip playing.
  24. Hugh macrumors 6502a


    Feb 9, 2003
    Erie, PA
    No heat/slow problems on my Late 2007 MacBook with 4gig ram. I'm even running Lion on a Jump Drive and I'm not getting any slow down. :/

  25. avdb12 macrumors newbie

    Aug 3, 2011
    Antwerp, Belgium

    The real problem is that many people are experience in this case heat problems regardless of it is a .0 .1 or .8 version. I do understand that some application or functions does not work a 100% due too the update of Lion however this heat issues seem to my that could be know by Apple in the beta test period if you read the many complains on the internet about it ! So it pitty that Apple has launched Lion with this issue.. I also use Istat and at this moment I nearly can boil water on it!

    I would like to downgrade to snow leopard however the upgrade to Lion is h*ll of a lot easier than a downgrade... now I need to backup all my files to do a clean install and after the install put all my files back! that need some more time than the hour it needed to updated!! is that Steve his idea of great user experience?

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