21st November 2019

appletoolbox
13

How do you factory reset a MacBook Air?

Start up or Restart using macOS Recovery
  1. Turn on or restart your MacBook and hold down the Option+Command (?)+ R keys.
  2. Use Disk Utility to erase your startup disk AND any other internal hard disk.
  3. Select your drive's name from the left side list and click the Erase.

In this regard, how do you do a hard reboot on a Mac?

Hold the power button for 5 seconds to shut off. Power on and hold the Shift key down when you hear the startup tone. This should perform a safe boot. Then goto System Preferences > Startup Disk > select your MacIntosh HD > click restart.
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