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iPhone 11

iOS 17.5.1 (21F90) for iPhone 11

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

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Download (7.5 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 in to your PC.
  3. Open iTunes, and navigate to your iPhone 11.
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the iPhone12,1_17.5.1_21F90_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_17.5.1_21F90_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_17.5.1_21F90_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_17.5.1_21F90_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: 3f5cfa129fd8cd3e18fb4e5787807818c74c90f3. 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_17.5.1_21F90_Restore.ipsw
  3. The output of the command should match the following checksum: 3f5cfa129fd8cd3e18fb4e5787807818c74c90f3. 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_17.5.1_21F90_Restore.ipsw
  3. The output of the command should match the following checksum: 3f5cfa129fd8cd3e18fb4e5787807818c74c90f3. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum afe26e85376192a95c82c58f34dd304d552845a40d9ef1b8dfc3b9c8ae262351
MD5sum 341f77265246a324ae3781105a3d4639
SHA1sum 3f5cfa129fd8cd3e18fb4e5787807818c74c90f3
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 addresses a rare issue where photos that experienced database corruption could reappear in the Photos library even if they were deleted.

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