kernel_task take upto 300-400% CPU

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Level 1

4 points

kernel_task take upto 300-400% CPU

I have a MacBook air 2014 (early) my laptop is working fine till this week, but now it starts lagging when is looked at activity manager kernel_task takes up to 250-300% CPU.

things I have tried before raising an issue

my CPU temperature is 35-45 degrees Celsius
when I restart my laptop it works fine for 15-30 minutes then again starts lagging
I have tried reinstalling Mohave and updating to bigsur(clean install) and going back to el Capitan(clean install)
I have tried one tutorial saying to delete some extension files in the system folder
i have tried safe mode
disabling and enabling System integrity protection

I have attached a screenshot of the activity manager before and after the issue starts

also attached ETREcheckpro report

etrecheckpro report

and a screenshot of "kextstat" command in safe mode and in normal mode

safe mode :-

in normal mode :-

one more thing if that matter :--

I have a MacbookAir6, 2 but there is NO file of this name in /System/Library/Extensions/IOPlatformPluginFamily.kext/Contents/PlugIns/ACPI_SMC_PlatformPlugin.kext/Contents/Resources

Posted on Aug 10, 2022 1:29 AM

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Answer 1

BDAqua

Level 10

250,253 points

Aug 10, 2022 7:49 AM in response to Pranav8909

Whew, might be tough finding the problem with such an old underpowered Mac, but...

Start with this...

Safe Boot, (holding Shift key down at startup), does the problem occur in Safe Mode? Could take 10 minutes or more.

Safe mode attempts to repair Disks & clears lots of caches & loads safe Drivers, & prevents loading of 3rd party extensions, so if Safe Mode works try again in regular boot.

Open Font Book in Applications, Validate all fonts.

You possibly have this problem...

Quicklookd and Quicklookuihelper crashes … - Apple Community

Also...

finder - Mojave quicklook stuck at loading - Ask Different (stackexchange.com)

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Answer 2

BobHarris

Level 9

56,783 points

Aug 10, 2022 4:38 AM in response to Pranav8909

If kernel_task is using a large percentage of your Mac CPU - Apple Support

one thing to consider is you have an accumulation of dust/pollen/smoke particles in your fans and on cooling fins.

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Answer 3

BDAqua

Level 10

250,253 points

Aug 10, 2022 3:06 AM in response to Pranav8909

By clean Install do you mean an Erase & no migrating of Data?

We need to see what all is running, a report from this will not display any personal info...

EtreCheck is a FREE simple little diagnostic tool to display the important details of your system configuration and allow you to copy that information to the Clipboard. It is meant to be used with Apple Support Communities to help people help you with your Mac. It will not display any personal info.

https://www.etrecheck.com/

Pastebin is a good place to paste the whole report if you capture the URL while there…

https://pastebin.com/

Workable but harder for me to work with...the Note tool on the bottom of this editor's toolbar, as shown in the image, to copy and paste the output from EtreCheck. In a Reply before you click post, look for this to add longer texts...

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