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IStat reads 126 degrees on Macbook - and gets very slow

Could this be my problem? My computer gets very slow and the fan kicks in and gets very loud. This often happens all the time and especialy when watching videos or looking at photos

Is Apple’s shutdown fix crippling MacBooks?
Apple Computer (AAPL) issued a software update Thursday to fix a problem that caused hundreds of newer MacBook laptops to shut down suddenly — but one longtime industry analyst suspects Apple’s solution might force the computers to run more slowly.

An Apple spokeswoman would not provide details about what was causing the shutdowns, or how the software update corrects it.
According to the site, which emerged over the past few weeks to document the problem and draw Apple’s attention, more than 1,500 MacBook users have had their laptops suddenly turn off. Many took the time to list their names, MacBook models, and serial numbers on the shutdown site.
Rob Enderle, principal analyst with Enderle Group, said that based on user comments in Apple’s online support forums he suspects the laptops have been shutting down because of overheating problems with the main logic board and “heat sink,” a device that’s meant to cool the machine.
“What they appear to be doing is doing a firmware update to step down the processor,” Enderle said. “If you can step down the processor, say, 5 or 10 percent, you can lower heat dramatically.”
But if indeed Apple is doing that, another result is decreased laptop performance. Enderle likened it to throttling back a V8 engine to make it behave like a V6. It won’t get as hot, but it won’t go as fast either.

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  • tmcalder Apr 14, 2009

    Can it be fixed?

  • tmcalder Apr 14, 2009

    It used to work fine, but now I can hardly do anything without setting the fan off and then everything gets very choppy and freezes up for a bit.

  • tmcalder Apr 14, 2009

    Even when my laptop is cool - when I turn it on first thin in the morning the heat sensor still reads 126 degrees and sometime dips down to 30 or even a negative number in seconds and then back up to 126 - that can't be right.

  • Nathanh29 May 11, 2010

    Hi there,

    this is a common limitation with lots of apple macbooks early generation models.

    Was there a specific question you had that i can help you with?




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Perhaps it is a software or firmware issue.

Make sure you have updated you mac to the latest firmware possible via software update. To get to this, click on the apple in the top left hand corner of your screen and select software update.

If that doesn't fix it, then perhaps doing a complete reinstall of the software will help, followed by updating your software using the method previously mentioned.

If this still doesn't help, then it would be a good idea to bring it into apple.

you can find a local apple reseller by calling apple on 1-800-MY-APPLE

Or you can visit an apple retail store by visiting

Hope this helps.


Posted on Apr 14, 2009


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