iOS 17.2.1 (21C66) for iPhone 11

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iPhone 11

✗ This firmware is not signed. This means you cannot 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 (6.8 GiB)

This firmware is not signed. This means you cannot restore to it in Finder, the Apple Devices app, iTunes, or idevicerestore. The instructions below are included for reference only.

Windows

  1. Install the latest version of Apple Devices from the Microsoft Store.
  2. Plug your iPhone 11 in to your PC.
  3. Open Apple Devices, and navigate to your iPhone 11.
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the iPhone12,1_17.2.1_21C66_Restore.ipsw file that you downloaded.
  6. Wait for the restore to complete, and the iPhone 11 to reboot.

macOS

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

Linux

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

Windows

  1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
  2. Type Get-FileHash iPhone12,1_17.2.1_21C66_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: 658e5a63e1adedcb43a2672f26f0b1751be55fff. 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 iPhone12,1_17.2.1_21C66_Restore.ipsw
  3. The output of the command should match the following checksum: 658e5a63e1adedcb43a2672f26f0b1751be55fff. 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 iPhone12,1_17.2.1_21C66_Restore.ipsw
  3. The output of the command should match the following checksum: 658e5a63e1adedcb43a2672f26f0b1751be55fff. If it doesn't, you may need to redownload the file.

Checksums

SHA256sumff373763bb1fe50fb7a19a7f1084c217336a173da9a27afcb72092f13858e937
MD5sumff373763bb1fe50fb7a19a7f1084c217336a173da9a27afcb72092f13858e937
SHA1sum658e5a63e1adedcb43a2672f26f0b1751be55fff
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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