No. kernel_task is the operating system.
High CPU from kernel_task is often deliberate, to keep the Mac cool.
Activity Monitor lists kernel_task like an app, but it's the kernel. One of its tricks confuses people: under thermal pressure, macOS makes kernel_task appear to use lots of CPU so that other processes get less, cooling the machine. The fix is to reduce the heat, not to kill anything. It handles networking internally, but app traffic shows under the apps.
Facts
- Owner
- Apple (part of macOS)
- Network-related
- No
- Block it?
- Don’t block it
Should you worry?
No. kernel_task is the operating system. When it shows high CPU, macOS is often reserving CPU time to reduce heat; check what's making the Mac hot, such as heavy apps, blocked vents or a charger on the left side of some Intel MacBooks.
Frequently asked questions
Why is kernel_task using so much CPU?
Often thermal management: macOS gives kernel_task CPU time so apps get less and the Mac cools down. Reduce the load, check ventilation and close heavy apps.
Can I quit kernel_task?
No. It's the core of macOS; it can't be quit.
Is kernel_task a virus?
No. It's the operating system kernel and always runs.