Restart Core Audio
When CPU or memory usage on your mac are increased by Core Audio daemon, restarting it may work.
Environment
- macOS Catalina 10.15.7
Problem
Sometime, your Mac (especially with intel CPU) slows down and a fan is noisy. You can check it by activity monitor or top command; you may found coreaudiod runs with the high usage of CPU and memory resources by 5% or more CPU occupation.
Core Audio is the digital audio infrastructure of iOS and OS X. According to discussions in such as stackexchange.com, “The high CPU usage of coreaudiod is due to the ambient noise reduction software working” or “some applications running in the background use microphone”. In my case, plugging in/out MIDI devices or starting/stopping audio related applications frequently, Core Audio may impede mac’s healthy resource consumption against it’s original purpose of “high performance and low latency audio processing”.
Solution
Just restart Core Audio daemon worked in my case.
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