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User profile for user: mahmoudelbursh
mahmoudelbursh Author
User level: Level 1
4 points

kernel_task is using a large percentage of my Mac CPU

how can i fix that ?

kernel_task is using a large percentage of my Mac CPU

I tried to do a complete reset of the system

I tried  to reset SMC and reset nvram, and it didn't work

plz help .

MacBook Pro 13″, macOS 10.15

Posted on Oct 6, 2020 2:29 PM

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User profile for user: John Galt
John Galt
User level: Level 10
146,306 points

Posted on Oct 6, 2020 7:30 PM

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


A runaway kernel_task can be due to a number of factors, such as:


  • a failed or disconnected temperature sensor
  • cooling system inefficiency (an inoperative exhaust fan on Macs so equipped, possibly clogged with dust, including the heat sink)
  • a worn out, missing, or non-Apple (user-installed) battery on portable Macs
  • similar hardware-specific causes including internal hardware additions or modifications, external USB and other connected devices, or the driver software required to use them.


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User profile for user: John Galt
John Galt
User level: Level 10
146,306 points

Oct 6, 2020 7:30 PM in response to mahmoudelbursh

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


A runaway kernel_task can be due to a number of factors, such as:


  • a failed or disconnected temperature sensor
  • cooling system inefficiency (an inoperative exhaust fan on Macs so equipped, possibly clogged with dust, including the heat sink)
  • a worn out, missing, or non-Apple (user-installed) battery on portable Macs
  • similar hardware-specific causes including internal hardware additions or modifications, external USB and other connected devices, or the driver software required to use them.


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kernel_task is using a large percentage of my Mac CPU

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