Whether you are looking to sell your MacBook Airandwant to wipe its data for your securityorwant to start over with a fresh installation of macOS, follow this tutorial to clear all the data off your computer.

You have options to reset your MacBook to factory default settings, which removes all your personal data, or erase the computer drive completely without setting it up with an operating system at all, which is rarely the better choice.

Information in this tutorial applies to macOS Big Sur (11.0)andlater.Older versions of the operating system follow similar steps.

This process erases all the data on your computer, including files, photos, videos,andprograms.Follow the backup procedure below to make a copy of your data before continuing.

Backing Up Your MacBook Air

Before you begin wiping your MacBook Air, back up any data on the machine so that you have a duplicate.Any data remaining on the laptop when you wipe the computer is permanently lost.Follow these steps to back up your MacBook to an external storage device using Time Machine, which is installed on your Mac:

1. Plug in an external storage device to your MacBook Air's port.

   When purchasing an external drive for backup purposes, ensure the drive has enough capacity to cover your internal drive.

2. OpenSystem Preferenceson your Mac.

3. ClickTime Machine.

   

4. Select theChoose Backup Disc or Select Diskoption.

5. Choose yourUSB storage deviceand clickUse Disk.

6. On the next screen, selectSave.

Within a few minutes, the backup process begins.Your first backup may take a few hours or more depending on how much data is on your machine.Check back in the Time Machine preference pane to confirm when Time Machine has finished its first backup. It will note when its latest backup completed. For more information, check out our detailed tutorial on using Time Machine.

Sign Out of iCloud on Your MacBook

Before you wipe your MacBook Air, it is a good idea to sign out of iCloudandservices such as Find My Mac. If you don't sign out of said features, future users may be prompted for your login information. Follows these steps to easily log out of iCloud on your device:

1. OpenSystem Preferenceson your Mac.

2. SelectiCloud. (In newer versions of macOS, selectApple ID/Apple Account>iCloud.)

3. ClickSign Out. (In newer versions of macOS, selectOverview>Sign Out.)

   You might be prompted to enter your password when signing out of iCloud.

4. When the dialog asks whether you want to keep a copy of your iCloud data, selectKeep a Copy.

Wiping Your MacBook Air and Reinstalling macOS

If you are simply cleaning out your machine to start from scratch or are selling or gifting the unit to another individual, erase it and reinstall macOS, so that the computer is usable. If done successfully, the Mac's software appears as it did when you first unboxed the unit.

The following steps will completely erase your MacBook's internal storage device; all data and information will be lost.

1. Begin by shutting down your Mac from theApplemenu or by pressing thepowerbutton once on your keyboard.

2. Once your computer is completely off, hold down theCommand and Rkeys on your MacBook's keyboard simultaneously.

3. Without letting go of any previous keys, turn on your MacBook Air by pressing thepowerbutton.

4. Once you see the Apple logo or a Spinning Globe on screen, you can let go of theCommand and Rkeys.

5. Allow the computer to start up into Recovery Mode, you can proceed once you are presented with the macOS Utilities window.

6. Within themacOS Utilitieswindow, selectReinstall macOS.

7. ClickContinueto begin the macOS installer.

   The macOS installer may ask you to unlock your disk or enter your Mac password before continuing.

8. Your MacBook will restart several times as it erases the old disk and installs macOS. A progress bar shows you the estimated amount of time remaining.

9. Once this is complete, the machine boots to the Setup Assistant to begin setting up the computer. If you don't want to set up the Mac because you are selling or gifting it, pressCommand+Qto quit the wizard and then shut down your computer.

Wiping Your MacBook Air Without Reinstalling macOS

Once you have confirmed that your data is backed up to an external storage device, you can begin erasing your MacBook Air's internal storage of all information. Follow these instructions to begin the process if you want to erase the machine and not reinstall macOS:

The following steps will completely erase your MacBook's internal storage device; all data and information will be lost.

1. Begin by shutting down your Mac from theApplemenu or by pressing thepowerbutton once on your keyboard.

2. Once your computer is completely off, hold down theCommand and Rkeys on your MacBook's keyboard simultaneously.

3. Without letting go of any previous keys, turn on your MacBook Air.

4. Once you see the Apple logo or a Spinning Globe on screen, you can let go of theCommand and Rkeys.

5. Allow the computer to start up into Recovery Mode. Proceed when you see the macOS Utilities window.

6. In themacOS Utilitieswindow, selectDisk Utility.

7. Under theViewmenu option, selectShow All Devices.

   

8. Below theViewmenu button are the drives attached to your machine. Select your primary drive; it contains Macintosh HD within it.

9. Once your drive is selected, selectErase.

10. In theErasewindow, leave all settings as is and clickErase.

11. Restart your Mac. If successfully erased, your machine will turn on to a flashing question mark in a folder icon.

Additional macOS Install Options

By default, pressingCommand+Rwhen booting your Mac leads you to install the latest version of macOS that has been installed on your machine.

However, two additional options are available when booting, and they are as follows:

• PressOption+Command+Rto install the latest version of macOS that is compatible with your MacBook Air.
• PressShift+Option+Command+Rto install the version of macOS that came with the Mac. If your MacBook Air is older, it will install the closest version that's available.

How to Wipe a MacBook Air Running macOS Monterey (12.0) or Later

If your MacBook is running macOS Monterey (12.0) or newer, you have an easier option to clear your device without uninstalling the operating system. TheErase All Content and Settingsprocess in System Preferences works like the same-named feature on the iPhone. When you run it, your Mac will clear your data along with all of the apps you've installed, but it will be faster than most other resets because it doesn't touch the OS.