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.
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