kernel_task

Hi rodolfofromweston,

Thanks for using the Apple Support Communities. I'm sorry to hear you are having issues with your MacBook Pro. I'm a bit unclear on the exact nature or scope of the issue you are describing (what kind of troubles?), but if you are seeing the kernel_task process taking up what appears to be an unusual amount of CPU cycles, this may be normal, or in response to a different issues:

Apps normally use a larger percentage of the CPU when doing tasks that require intensive calculations, such as encoding video. But CPU use should decrease when the task is finished, and it should stop entirely when the app is no longer open. Any process consistently using more than 70 percent of your CPU is putting a significant load on the CPU and could be malfunctioning.

Activity Monitor may show that a process named kernel_task is using a large percentage of your CPU, and during this time you may notice a lot of fan activity. This process helps manage temperature by making the CPU less available to processes that are using the CPU intensely. In other words, kernel_task responds to conditions that cause your CPU to become too hot. When the temperature decreases, kernel_task automatically reduces its activity.

Apps can affect Mac performance, battery runtime, temperature, and fan activity - Apple Support

Regards