iMac running HOT after Sierra install

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Level 1

33 points

iMac running HOT after Sierra install

Has anyone had a problem or noticed that their Mac is running hot since installing Sierra?

Also, 2 days ago I had a notice that I had run out of application memory and iTunes and Safari were paused. There wasn't any applications running overnight and I've got 20 GB's of RAM and it showed that 18.86 GB's were in use. I had to basically force iTunes and Safari to close and than reboot the iMac to free up the memory and be able to access the computer.

Never had these issues before Sierra was installed. The iMac never ran "hot" (was over 121 degrees last night - had to shut it down to cool it off).

So if anyone has run into any of these issues or knows a fix I would greatly appreciate it.

Thanks,

Sal

iMac, macOS Sierra (10.12), iPhone 7 Plus, iPad Pro, Apple TV

Posted on Sep 25, 2016 11:06 PM

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Answer 1

Kappy

Level 10

362,017 points

Sep 25, 2016 11:16 PM in response to Sal Serio

Fix Sierra Installation

Try each of these in order. Test to see if the computer is working properly:

Reset the PRAM
Reset the System Management Controller (SMC)
Start the computer in Safe Mode, then restart normally. This is slower than a standard startup.
Repair the disk by booting the from the Recovery HD. Immediately after the chime hold down the Command and R keys until the Utility Menu appears. Choose Disk Utility and click on the Continue button. Select the indented (usually, Macintosh HD) volumeentry from the the side list. Click on the First Aid button in the toolbar. Wait for the Done button to appear. Quit Disk Utility and returnto the Utility Menu. Restart the computer from the Apple Menu.
Reinstall OS X by booting from the Recovery HD using the Command and R keys. When the Utility Menu appears select Reinstall OS X then click on the Continue button.

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Answer 2

John Galt

Level 10

156,260 points

Sep 26, 2016 12:28 AM in response to Sal Serio

Please read Apps can affect Mac performance, battery runtime, temperature, and fan activity - Apple Support.

Spotlight indexing can take a long time after installing an operating system upgrade: If the fans on your Mac notebook computer run after you migrate data - Apple Support. If your Photos library contains thousands of photographs, it will take a long time for the upgraded Photos app to analyze your library.

To identify the apps or processes that may be burdening your Mac, please refer to Use Activity Monitor on your Mac - Apple Support. Post a screenshot of that Activity Monitor window, similar to the following, with theCPU tab selected, and the %CPU column sorted in decreasing order:

Don't capture or post any information you may consider personal.

To learn how to capture, edit, and post a screenshot please read the Appendix in Writing an effective Apple Support Communities question.

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Answer 3

Sal Serio Author

Level 1

33 points

Sep 26, 2016 2:43 AM in response to Kappy

Thanks Kappy will try your suggestions, though I believe the issues are being caused by Sierra, but you never know. Hopefully your steps will correct the problem.

Thanks again,

Sal

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Answer 4

Sal Serio Author

Level 1

33 points

Sep 26, 2016 2:50 AM in response to John Galt

I have run the Activity Monitor earlier and checked what processes were using a lot of CPU, but nothing really jumped out. Will try it again. I'll also read the post you suggested.

As far as the indexing I installed Sierra on 9/20/16 the day it was released and I didn't notice these issue until 9/24/16, so how long would indexing normally take, if that is what is causing the problem?

Like I mentioned to Kappy, I think Sierra is the cause of these issues and hopefully Apple will be releasing a fix shortly.

Thanks,

Sal

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Answer 5

Kappy

Level 10

362,017 points

Sep 26, 2016 2:20 PM in response to Sal Serio

Those steps are for Sierra. They work for every Lion and later versions of OS X.

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Answer 6

King_Tvr

Level 1

9 points

Oct 5, 2016 1:10 PM in response to Sal Serio

Just updated my MBP retina 15 to Sierra and nearly burnt myself off the keyboard its running way too hot Apple what have you done the computer was 10 times better before this upgrade - fans running flat out had to restart. Please address this asap and release an update - really poor form from Apple

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Answer 7

Oct 10, 2016 9:09 PM in response to King_Tvr

I feel the same way, my computer was perfect until I updated to Sierra. I can't use my computer at this point. I am scared of damaging it.

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Answer 8

Oct 15, 2016 2:44 PM in response to Sal Serio

Hi
I had the same issue after installing Sierra
After searching, pretty sure it is the initial photoanalysis (it is using large amounts of CPU)

This analysis is almost finished - Has taken a good day, so will confirm after it's completed.
Refer to photoanalysisd taking large amounts of cpu

Regards
Bruce

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