Here we’ll tell you how to factory reset your Mac and clear all your data. In both cases, a factory reset is what you need. Or perhaps you've encountered some troublesome system issues, and you're looking to start from scratch. Once you've done all these steps let us know how you went.If you've decided to upgrade or sell your old Mac, it's essential for your privacy to wipe your data clean first. Turn your computer back on with the power button.Press at the same time shift option control (on the left side of the keyboard) and the power button.Keep the MagSafe adapter (power cable) plugged in.mouse speed, time and date/timezone, etc).įor your model MacBook Pro, resetting the System Management Controller requires these steps: Note: When you log back in you may need to readjust some of your system preferences (e.g. Let go of the keys and let your Mac reboot normally.Hold those keys down until your Mac reboots again and you here the startup chime.You have to make sure you press these keys before the gray screen appears or it won’t work.
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