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MacBook Air (M1, Late 2020)

macOS 12.3.1 (21E258) for MacBook Air (M1, Late 2020)

✓ This firmware is signed. This means that you can restore to it in iTunes.

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Download (13.9 GB)

Windows

  1. Install the latest version of iTunes from the Microsoft Store.
  2. Plug your MacBook Air (M1, Late 2020) in to your PC.
  3. Open iTunes, and navigate to your MacBook Air (M1, Late 2020).
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the UniversalMac_12.3.1_21E258_Restore.ipsw file that you downloaded.
  6. Wait for the restore to complete, and the MacBook Air (M1, Late 2020) to reboot.

macOS

  1. Plug your MacBook Air (M1, Late 2020) in to your Mac.
  2. Navigate to your MacBook Air (M1, Late 2020) in Finder.
  3. Hold the Option or Alt key on your keyboard, and press "Restore".
  4. Select the UniversalMac_12.3.1_21E258_Restore.ipsw file that you downloaded.
  5. Wait for the restore to complete, and the MacBook Air (M1, Late 2020) to reboot.

Linux

  1. Install idevicerestore.
  2. Plug your MacBook Air (M1, Late 2020) in to your PC.
  3. Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
  4. To perform a full erase restore, type idevicerestore -e UniversalMac_12.3.1_21E258_Restore.ipsw and press enter.
  5. Wait for the restore to complete, and the MacBook Air (M1, Late 2020) to reboot.

Windows

  1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
  2. Type Get-FileHash UniversalMac_12.3.1_21E258_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: 81033c922c5d43f57907d063fb01865f4c856b37. If it doesn't, you may need to redownload the file.

macOS

  1. Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
  2. Type openssl sha1 UniversalMac_12.3.1_21E258_Restore.ipsw
  3. The output of the command should match the following checksum: 81033c922c5d43f57907d063fb01865f4c856b37. If it doesn't, you may need to redownload the file.

Linux

  1. Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
  2. Type openssl sha1 UniversalMac_12.3.1_21E258_Restore.ipsw
  3. The output of the command should match the following checksum: 81033c922c5d43f57907d063fb01865f4c856b37. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum cb0443525571ea5e54aa5a8fd9c52774591892311405183741f4a02f993e18d5
MD5sum 6c943a751207e9e06ab018a7bb568d40
SHA1sum 81033c922c5d43f57907d063fb01865f4c856b37
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