When you switch on your Mac, several applications and system processes start running in the background. These processes are crucial to maintaining your Mac’s proper functioning. For instance, WindowServer handles necessary GUI or graphical user interfaces, such as the Menu Bar and Dock. Another critical component ensuring your Mac runs smoothly is kernel_task.
kernel_task is an important component of the Mac operating system, and it is specifically designed to balance the temperature of the CPU and prevent your system from overheating. Whenever it detects an increase in CPU temperature, kernel_task takes up the maximum CPU percentage to limit system resources available to programs or processes responsible for the spike in temperature.
As you are already aware, overheating isn’t good news for your Mac. Therefore, when CPU-intensive programs cause your system to feel hot to touch, kernel_task steps in to hoard CPU resources so that the processes and programs’ temperature doesn’t increase further.
Is there any limit to the CPU percentage that kernel_task can utilize?
No, there isn’t any fixed percentage or amount of CPU resources that should be used by kernel_task. It will utilize a significant percentage when different processes raise the temperature and make your Mac abnormally hot.
Put simply, kernel_task uses the CPU resources to regulate the temperature of your system.
Is kernel_task for Mac safe?
Yes, kernel_task for Mac is safe. Users typically question its legitimacy because of the high Mac kernel task CPU usage. However, note that it is normal for kernel_task to use a large amount of CPU. But it would help if you remembered that kernel_task doesn’t function out of its volition. It responds to the CPU’s temperature.
If the CPU is getting hot, kernel_task will swoop in to help regulate and lower the temperature. It will be evident by the enhanced fan activity, or you may even hear fan noises and the high CPU usage. Therefore, when kernel_task uses the processing power of your Mac, do not think that it is the devil. In reality, it is working toward bringing down the temperature, so your system doesn’t feel so hot.
It is also important to note that kernel_task cannot be terminated, which proves the process’s legitimacy and safety. The process runs in the background, and it is a vital element of macOS, and your Mac cannot do without it.
How can you fix high CPU usage by kernel_task?
Usually, kernel_task lurks in the background, and it doesn’t consume many system resources. But that’s under normal circumstances. Factors like temporary system glitches, high ambient temperatures, or CPU-intensive processes and programs running in the background force kernel_task to take action by consuming an insane percentage of CPU.
You can regulate the high CPU consumption in the following ways:
- Force quit the applications you are not using but running in the background. When you’re using too many applications, it is common for your system to feel hot because your system is working harder to accommodate resources for the multiple applications you have opened. The more heat your system generates, the faster kernel_task will be triggered. Therefore, you need to close all the apps you’re not using by clicking the X sign. Alternatively, you can go through the Activity Monitor to look for suspended applications that quietly consume the processing power.
- If you’ve plugged in too many power-hungry accessories on your Mac’s side, it can make the CPU overheat. Suppose you have a charging cable, an external drive, a mouse, and an external monitor plugged into the USB hub of your Mac’s left side, it will slowly raise the temperature of the CPU and trigger kernel_task. You need to decongest the ports and remove the items you are no longer using. Also, you can try spreading the accessories on both sides of your Mac to fix the issue.
- Restart your system because that is one of the best ways to bring down the temperature and restart the processes from scratch. The moment you restart, your system will refresh and remove all the unnecessary applications.
- You can reset the SMC or system management controller that oversees the functioning of the cooling fans, battery, lid behavior, keyboard backlight, etc. If your Mac has a T2 security chip, click the Apple logo > choose Shut Down > press and hold Shift + Control + Option keys for seven seconds and also press and hold the power button > hold all the keys for ten seconds and then release them > switch on your Mac.
So, as you can see, kernel_task is a critical component for your Mac, and it helps in balancing the CPU’s temperature. The tips mentioned above will help you troubleshoot when your Mac feels warmer than usual. If the problem persists, contact a technician.