I noticed my Mac Mini was thrashing the fac despite not really running much, in the process of trying to figure out why I was surprised to see Activity Monitor itself bouncing around 8-12% CPU.

Is this expected?

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  • At the moment Activity monitor starts, it spikes up % usage. Later it decreases. How long did you run the app before checking it ?
    – anki
    Oct 18, 2019 at 11:21

1 Answer 1


Yes, it is expected. It has a lot to keep track of sometimes, and in the scheme of things, 8%-12% CPU is rather trivial. I've never seen it spike the CPU all by itself in years of looking at it.

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