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Why is kernel_task hogging the CPU?
MacFormat UK
|November 2025
To cool a notebook Mac running with its case closed in clamshell mode, open it and clear around its case.
Q Why does Activity Monitor keep showing kernel_task is taking high CPU %?
A This is a sign of thermal strain, telling you to let your Mac cool down.
This story is from the November 2025 edition of MacFormat UK.
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