Hi, guys again. I found the problem via this support information why kernel_task up to high? One of the functions of kernel_task is to help manage CPU temperature by making the CPU less available to processes that are using it intensely. https://support.apple.com/en-us/102172 Then I think it's about my MacBook temp. and open it to clean. I noticed that there was a lot of dust, which was hindering the fan from working and cooling. After clean now everything looks like ok if its not about software I mean MacOS, think about the hardware cleaning. If you think its about operating system; 1- Take backup via Time Machine (to return your backup if any issues), 2- Run repair disk with Disk Utility, 3- Reinstall MacOs.

Year, end of 2024 and we already have this problem :) Is there anyone to help us from apple supports? When I plug in 1 external monitor via type-c adapter (I used 3 different devices, and same result) cpu usage suddenly up to 70-80% (kernel_task) we don't know detail which process increase in kernel? I remember that I used 2 monitor on type-c adapters and before there is no problem. We need your help Apple Inc, we have problem with your device so please support us. I have MacBook Pro 16-inch, 2019 2.6 GHz, 6-Core Inter Core i7 Intel UHD Graphics 630 1536 MB 16 GB 2667 MHz DDR4 OS, Sequoia 15.2