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iPhone 11 Pro

iOS 17.2.1 (21C66) for iPhone 11 Pro

✗ 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 (7.46 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 11 Pro in to your PC.
  3. Open iTunes, and navigate to your iPhone 11 Pro.
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the iPhone12,3,iPhone12,5_17.2.1_21C66_Restore.ipsw file that you downloaded.
  6. Wait for the restore to complete, and the iPhone 11 Pro to reboot.

macOS

  1. Plug your iPhone 11 Pro in to your Mac.
  2. Navigate to your iPhone 11 Pro in Finder.
  3. Hold the Option or Alt key on your keyboard, and press "Restore".
  4. Select the iPhone12,3,iPhone12,5_17.2.1_21C66_Restore.ipsw file that you downloaded.
  5. Wait for the restore to complete, and the iPhone 11 Pro to reboot.

Linux

  1. Install idevicerestore.
  2. Plug your iPhone 11 Pro 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 iPhone12,3,iPhone12,5_17.2.1_21C66_Restore.ipsw and press enter.
  5. Wait for the restore to complete, and the iPhone 11 Pro to reboot.

Windows

  1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
  2. Type Get-FileHash iPhone12,3,iPhone12,5_17.2.1_21C66_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: 6b0be6e23dedcf9c3f43b983a99102a383fed499. 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 iPhone12,3,iPhone12,5_17.2.1_21C66_Restore.ipsw
  3. The output of the command should match the following checksum: 6b0be6e23dedcf9c3f43b983a99102a383fed499. 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 iPhone12,3,iPhone12,5_17.2.1_21C66_Restore.ipsw
  3. The output of the command should match the following checksum: 6b0be6e23dedcf9c3f43b983a99102a383fed499. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum e135107807517e6f60202a26806cf7ea7ee625b1bbbb59d8b966414af0ff92a5
MD5sum c4f1e21c276108c510c32be8291d04cb
SHA1sum 6b0be6e23dedcf9c3f43b983a99102a383fed499
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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