iOS 26.5.1 (23F81) for iPhone Air

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iPhone Air

✗ This firmware is not signed. This means you cannot restore to it in Finder, the Apple Devices app, iTunes, or idevicerestore.

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Download (10 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 Air in to your PC.
  3. Open Apple Devices, and navigate to your iPhone Air.
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the iPhone18,4_26.5.1_23F81_Restore.ipsw file that you downloaded.
  6. Wait for the restore to complete, and the iPhone Air to reboot.

macOS

  1. Plug your iPhone Air in to your Mac.
  2. Navigate to your iPhone Air in Finder.
  3. Hold the Option or Alt key on your keyboard, and press "Restore".
  4. Select the iPhone18,4_26.5.1_23F81_Restore.ipsw file that you downloaded.
  5. Wait for the restore to complete, and the iPhone Air to reboot.

Linux

  1. Install idevicerestore.
  2. Plug your iPhone Air 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 iPhone18,4_26.5.1_23F81_Restore.ipsw and press enter.
  5. Wait for the restore to complete, and the iPhone Air to reboot.

Windows

  1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
  2. Type Get-FileHash iPhone18,4_26.5.1_23F81_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: d42f24d7cfb634bc7d636b1701c092ac8c684e79. 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 iPhone18,4_26.5.1_23F81_Restore.ipsw
  3. The output of the command should match the following checksum: d42f24d7cfb634bc7d636b1701c092ac8c684e79. 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 iPhone18,4_26.5.1_23F81_Restore.ipsw
  3. The output of the command should match the following checksum: d42f24d7cfb634bc7d636b1701c092ac8c684e79. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum5a5f57c78696d824de81f20f2ba4bf31125b3721ac55ddde5d65790897efef2d
MD5sumbe05ca2cb43131b1d653ee040d639d8e
SHA1sumd42f24d7cfb634bc7d636b1701c092ac8c684e79
Please note, the documentation below is supplied from Apple's update servers. We don't modify the contents of this documentation.

This update addresses an issue for a small number of users that may prevent wired charging on iPhone Air and iPhone 17 models when the battery is nearly drained.

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