Starting your Mac in Safe Mode might assist in diagnosing third-party programs responsible for the excessive CPU utilization of the kernel_task process. Keep holding those four keys until your Mac restarts.Immediately after the display comes on or when you hear the starting sound, hold down the following keys: P + R + Option + Command.When the NVRAM is reset, the CPU use of the kernel_task returns to normal. NVRAM is the memory that can keep data even when power to the memory chips has been switched off. While still holding Shift + Control + Option keys, press and hold the Power button for five seconds.Hold the Shift + Control + Option keys, all on the left side of the keyboard, for seven seconds.If you have a MacBook that was released in 2017 or before, follow these steps:
To begin using your Mac, simply press the Power button once more.Now, press the same keys at the same time: Power + Control + Options + Shift.Release all four keys after ten seconds of holding them down.Without releasing the three keys, click and hold the Power button.Now, press the Shift + Control + Options keys on your keyboard for seven seconds.Shut off the Mac and disconnect it from the power source (unplug the power adapter).To see how much RAM is being used, navigate to the Memory tab.Look up the CPU percentage in the CPU percentages table.In the Process Name column, find kernel_task.Open the Activity Monitor application from the Applications Utilities menu.With the help of Activity Monitor, you can see exactly how much memory and processing power the kernel_task uses. Reconnect your external monitors and keep an eye on the CPU use.Once you’ve released the keys, you may log in normally.If the computer does not restart after hearing the starting sound a second time, press and hold these keys for several seconds to perform an NVRAM reset.Press and hold the Command + Option + P + R keys shortly after you hear the starting sound.Shut it down again once OS X has loaded.Press the Power button to turn on the computer.Now, reset the SMC by simultaneously releasing all keys and the Power button.Press the Power button and the Shift + Control + Option keys simultaneously on the built-in keyboard.Connect your Mac to a power source through the MagSafe power adapter.However, some users can also experience the kernel_task when connecting an external monitor. Most likely, it’s an easily-solved problem that you should strive to resolve as soon as possible.Ī kernel_task hogging the CPU might have several different causes. The problem arises if your Mac’s CPU is overtaxed and you can’t get it back under control.
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