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Wait for the process to complete, and then follow the on-screen instructions that you will be given.Ībove is the step-by-step guide to help you factory reset MacBook Air.

Now your Mac will restart during the installation.Select your boot disk, and then click on Install. You will have to select your boot disk now.Continue ahead, and you will be asked to agree to the terms and conditions.On the next screen that opens up, choose Reinstall macOS and click on Continue.Now, click on the Wi-Fi icon on the top right corner and connect to your Wi-Fi network.After doing so, click on Erase and then on Done.Note: If you want to encrypt your disk, you can select the Journaled, Encrypted option and then create a password when prompted. After all the data from the disk has been erased, select Mac OS Extended (Journaled) from the drop-down menu and then click on Erase.