kernel_task is killing my wi-fi, how do I fix it?
Over the past few months I have had a strange issue where the wi-fi on my iMac has stopped working. Over a period of many weeks I have discovered the issue but do not understand why it is happening or how to resolve it.
Basically, I have determined that when the kernel_task process is running high as a % of CPU in Activity Monitor, my wi-fi performance is degraded and ultimately it switches off. In one incident, the wi-fi remained off for a month, before it suddenly came back to life. Other times, the problem lasts just a couple of mins. But the common factor in all occasions is that the kernel_task is running high, usually >50%, but as high as 400%!
I've read this is to do with temperature in the computer. However this also happens when I turn the computer on and the iMac is not warm to touch.
I've tried a PRAM reset, and killing apps, and unplugging USB hubs, nothing seems to work. It appears to be quite random.
Any thoughts on how to resolve would be greatly appreciated!
iMac 27″ 5K, macOS 11.5
