After 10 seconds, release All the Keys at the same time. Start your Mac by pressing the Power button. Also, you will be losing power related settings on your Mac, like the time it takes for the Mac to go into sleep mode. Dewianaa says:. January 8, at am. Anonimous says:.
How to reset the SMC, PRAM and NVRAM on a Mac Desktop
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When and How to Reset Mac SMC (System Management Controller)
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Martin Cohen says:. August 9, at pm. I'm with you! Press Shift-Control-Option on the left side of the built-in keyboard, then press the power button at the same time. Hold these keys and the power button for 10 seconds. Release all keys. If the battery is removable: Shut down your Mac. Remove the battery. Press and hold the power button for 5 seconds. Reinstall the battery. Unplug the power cord. Wait 15 seconds. Plug the power cord back in. Wait 5 seconds, then press the power button again to turn on your Mac. Release the power button, then wait a few seconds. Your Mac might turn on and show the Apple logo on its display.