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iPhone 12

iOS 17.2.1 (21C66) for iPhone 12

✗ This firmware is not signed. This means you cannot restore to it in iTunes.

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

Download (7.82 GB)

✗ This firmware is not signed. This means you cannot restore to it in iTunes. The instructions below are included for reference only.

Windows

  1. Install the latest version of iTunes from the Microsoft Store.
  2. Plug your iPhone 12 in to your PC.
  3. Open iTunes, and navigate to your iPhone 12.
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the iPhone13,2,iPhone13,3_17.2.1_21C66_Restore.ipsw file that you downloaded.
  6. Wait for the restore to complete, and the iPhone 12 to reboot.

macOS

  1. Plug your iPhone 12 in to your Mac.
  2. Navigate to your iPhone 12 in Finder.
  3. Hold the Option or Alt key on your keyboard, and press "Restore".
  4. Select the iPhone13,2,iPhone13,3_17.2.1_21C66_Restore.ipsw file that you downloaded.
  5. Wait for the restore to complete, and the iPhone 12 to reboot.

Linux

  1. Install idevicerestore.
  2. Plug your iPhone 12 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 iPhone13,2,iPhone13,3_17.2.1_21C66_Restore.ipsw and press enter.
  5. Wait for the restore to complete, and the iPhone 12 to reboot.

Windows

  1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
  2. Type Get-FileHash iPhone13,2,iPhone13,3_17.2.1_21C66_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: ea4463525e056c1c4d5ddd92f4fd2d1a71f96d2d. 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 iPhone13,2,iPhone13,3_17.2.1_21C66_Restore.ipsw
  3. The output of the command should match the following checksum: ea4463525e056c1c4d5ddd92f4fd2d1a71f96d2d. 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 iPhone13,2,iPhone13,3_17.2.1_21C66_Restore.ipsw
  3. The output of the command should match the following checksum: ea4463525e056c1c4d5ddd92f4fd2d1a71f96d2d. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum b3ddf66aa83335df5aa5b1ef5d9a209fa50812c65ae173adc6e1630c8a0dc48d
MD5sum 7d14cc55d3d9248d115d826392ebe76e
SHA1sum ea4463525e056c1c4d5ddd92f4fd2d1a71f96d2d
Please note, the documentation below is supplied from Apple's update servers. We don't modify the contents of this documentation.

This update provides important bug fixes and is recommended for all users.

For information on the security content of Apple software updates, please visit this website:

https://support.apple.com/kb/HT201222

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