Macbook Pro overheating because Mac OS Sierra

I have no clue what you're running but throughout its lifecycle, my MacBook Pro has NEVER gone that hot without doing a single thing. It's literally sitting there warming itself up. No, 175* is way too warm for the Apple experience we've all been accustomed to. My mac has traditionally operated between 90-130*F under normal conditions and when editing etc gone to 170*+ also 175* is crazy hot to be put in your lap - it is a laptop. I agree it's gotten warmer before as well but this issue is Sierra related. I haven't changed any variable of operation except updating to Sierra. Throughout the beta cycle, there were issues related to this I kept reporting and some like the previously mentioned activity monitor check etc revealed system operations which I was able to get resolved and reported to Apple right away.

It isn't. I was not using keychain till this past week including all of Sierra's beta phase and it ran at same heat levels you're experiencing. Was intrigued and decided to use keychain with no idea it was related and its still having the issues so no keychain is not to be blamed for this.

I too am having this problem. It super hot to the touch. All after changing operating systems. What to do?

It's a notebook, not a laptop

Thanks for the fix. I hope it works and have followed your instructions. Thanks again.

Gosh it was hot and couldn't keep my hand on the bottom. Did not have this issue until yesterday.

I got the same issue with my Macbook Pro 13 inch Mid 2012 the computer it's only one year old. The fan control helps a lot but, no with Mac OS Sierra. So I did a research on the Internet the new OS uses a lot graphics so I guess it's good for the new Macs that came this year, also since el capitan . Apple wants the users their macs to become obsolete like the i phones , so I downgrade to Mac OS YOSEMITE . I notice the fan control it's telling me that the cpu temperature it's not hot and it's runs faster. My advise use your mac with the operating system that came originally with your Mac but you have to be a guru do the factory reset.

Yes! this worked on my late 2010 Air, running Sierra. Many thanks 🙂

I also confirm that, if the CPU is used intensively after installing Mac OSx SIERRA, and fans run intensively, you need to access and turn on iCloud. I never had iCloud before, but once activated, my CPU use went from 30% down to 1%, and as well fans stopped almost immediately. I also confirm the problem was "secd". "secd" use of CPU went from 92% to 0%. So, it's an issue of SIERRA.

Thank you – did exactly as you said and it seems to have worked.

Same here.

Machine Type:

MacBook Pro (13-inch, Mid 2012)

Processor 2.9 GHz Intel Core i7

The only solution that worked was Ken's. Thank you a million!!

No matter what anyone else says IT IS A SIERRA INSTALLATION ISSUE!!!

No matter what anyone at all says, it is not.

I would leave semantics out of this, but if you really want to get into that then:

according to the Oxford Dictionary laptop and notebook are synonyms.

If I buy a portable computer I do not expect to be able to cook my eggs on it!

Especially when the machine is idled.

cogs wrote:

I would leave semantics out of this,

And you free to do so.

cogs wrote:

<snip>

No matter what anyone else says IT IS A SIERRA INSTALLATION ISSUE!!!

No it is not. If it was there would be hundreds or thousands of posts about it. There is something else, likely third party apps and your specific system configuration that are causing overheating if indeed there is overheating.

Yes it is. I tried this in Safe mode when no 3rd party software is loaded and the same happened.

Then I figured out that disconnecting the external monitor from the Mini Display Port fixed the issue. Any time I connect my external monitor to the Mini Display Port kernel_task go crazy.

There you have.