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iMac 24-inch (M1, Two Ports, 2021)

macOS 15.6.1 (24G90) for iMac 24-inch (M1, Two Ports, 2021)

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

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Download (16.8 GB)

Windows

  1. Install the latest version of iTunes from the Microsoft Store.
  2. Plug your iMac 24-inch (M1, Two Ports, 2021) in to your PC.
  3. Open iTunes, and navigate to your iMac 24-inch (M1, Two Ports, 2021).
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the UniversalMac_15.6.1_24G90_Restore.ipsw file that you downloaded.
  6. Wait for the restore to complete, and the iMac 24-inch (M1, Two Ports, 2021) to reboot.

macOS

  1. Plug your iMac 24-inch (M1, Two Ports, 2021) in to your Mac.
  2. Navigate to your iMac 24-inch (M1, Two Ports, 2021) in Finder.
  3. Hold the Option or Alt key on your keyboard, and press "Restore".
  4. Select the UniversalMac_15.6.1_24G90_Restore.ipsw file that you downloaded.
  5. Wait for the restore to complete, and the iMac 24-inch (M1, Two Ports, 2021) to reboot.

Linux

  1. Install idevicerestore.
  2. Plug your iMac 24-inch (M1, Two Ports, 2021) 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_15.6.1_24G90_Restore.ipsw and press enter.
  5. Wait for the restore to complete, and the iMac 24-inch (M1, Two Ports, 2021) to reboot.

Windows

  1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
  2. Type Get-FileHash UniversalMac_15.6.1_24G90_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: a19ba56bb931769580060647a466c5b2d09da761. 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_15.6.1_24G90_Restore.ipsw
  3. The output of the command should match the following checksum: a19ba56bb931769580060647a466c5b2d09da761. 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_15.6.1_24G90_Restore.ipsw
  3. The output of the command should match the following checksum: a19ba56bb931769580060647a466c5b2d09da761. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum 3d87686b691ac765eb6a6b3082b2334e2af9710096a00432dd519af89ff2ea78
MD5sum 2c22273091d69ea84723a1f2d36332f3
SHA1sum a19ba56bb931769580060647a466c5b2d09da761
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