macOS 15.3.1 (24D70) for iMac 24-inch (M1, Four Ports, 2021)

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

✓ This firmware is signed. This means that you can restore to it in Finder, the Apple Devices app, iTunes, or idevicerestore.

Your download should begin shortly. If it does not, you can download it directly here:

Download (15 GiB)

Windows

  1. Install the latest version of Apple Devices from the Microsoft Store.
  2. Plug your iMac 24-inch (M1, Four Ports, 2021) in to your PC.
  3. Open Apple Devices, and navigate to your iMac 24-inch (M1, Four Ports, 2021).
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the UniversalMac_15.3.1_24D70_Restore.ipsw file that you downloaded.
  6. Wait for the restore to complete, and the iMac 24-inch (M1, Four Ports, 2021) to reboot.

macOS

  1. Plug your iMac 24-inch (M1, Four Ports, 2021) in to your Mac.
  2. Navigate to your iMac 24-inch (M1, Four Ports, 2021) in Finder.
  3. Hold the Option or Alt key on your keyboard, and press "Restore".
  4. Select the UniversalMac_15.3.1_24D70_Restore.ipsw file that you downloaded.
  5. Wait for the restore to complete, and the iMac 24-inch (M1, Four Ports, 2021) to reboot.

Linux

  1. Install idevicerestore.
  2. Plug your iMac 24-inch (M1, Four 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_15.3.1_24D70_Restore.ipsw and press enter.
  5. Wait for the restore to complete, and the iMac 24-inch (M1, Four 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_15.3.1_24D70_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: c2b5bca53c6cf475e7a2a0b6d6c0db19477d69eb. 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_15.3.1_24D70_Restore.ipsw
  3. The output of the command should match the following checksum: c2b5bca53c6cf475e7a2a0b6d6c0db19477d69eb. 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_15.3.1_24D70_Restore.ipsw
  3. The output of the command should match the following checksum: c2b5bca53c6cf475e7a2a0b6d6c0db19477d69eb. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum559a78b75adc6bec77665b17db0e166eba326b04fc534e2a086253be92e043b0
MD5sum559a78b75adc6bec77665b17db0e166eba326b04fc534e2a086253be92e043b0
SHA1sumc2b5bca53c6cf475e7a2a0b6d6c0db19477d69eb
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