Why reset pram

If the problem you experience still exists after two such attempts, shut down the computer. Resetting the SMC restores the default settings related to low-level functions that you generally can't modify in System Preferences. The SMC controls the power button response, battery management, sleep settings, thermal management, lighting settings and video source selection.

MacBook models with batteries you shouldn't remove on your own require you to connect the power adapter, shut down the computer and hold the left side "Shift-Control-Option" keys simultaneously. The power light on your charger might change colors while you reset the SMC. If you're using a MacBook with a removable battery, disconnect the power adapter, shut down the computer, remove the battery, and press and hold the power button for five seconds. Release the power button, replace the battery and reconnect the power adapter, and power on the computer.

Desktop Macs require you to shut down the computer, unplug the power cord and wait 15 seconds before attaching the power cord again. After waiting five seconds, power on the computer. Tech Factor? First Name:. Last Name:. Thank You We just sent you an email to confirm your email address. If you have any questions, please contact us. I don't see anything but the? If there is no hard drive, it means it is dead.

And then start installing OS X again. If none of these work, replace the hard drive with a cheap Kingston SSD. That will imorove the speeds of booting up and installing OS X again is easy. DJ is pro - April 8. Fix Your Stuff Community Store. The functions that the SMC handled are now taken care of by the M1 itself. After 30 seconds, power on the Mac.

You need another Mac with the Apple Configurator 2 app installed, a USB-C cable that supports both power and data used to connect the two Macs , and an internet connection. Apple has the full details on how to revive or restore a Mac with Apple silicon with Apple Configurator 2.