IPSW Downloads

iPadOS 17.1.1 - 21B91 for iPad Air 4th Gen (WiFi+Cellular)

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

Release Date08 November 2023
Upload Date03 November 2023
File NameiPad_Fall_2020_17.1.1_21B91_Restore.ipsw
File Size6.85 GB
SHA256sum366e8fc562c5ffae67087ea42edab9e42b4f6e5c14a6427edc3cf7c5215c5746
MD5sum3fe2fa4d5103a4d5ec83a4f9363fec00
SHA1sumc05fad816fc0456db194ed41b48ca7dddd0d704e
IdentifieriPad13,2

Installation Instructions

Windows

  1. Install the latest version of iTunes from the Microsoft Store.
  2. Connect your iPad Air 4th Gen (WiFi+Cellular) to your PC.
  3. Open iTunes and navigate to your iPad Air 4th Gen (WiFi+Cellular).
  4. Hold the Shift key and click "Restore".
  5. Select the iPad_Fall_2020_17.1.1_21B91_Restore.ipsw file you downloaded.
  6. Wait for the restore to complete and for your iPad Air 4th Gen (WiFi+Cellular) to reboot.

macOS

  1. Connect your iPad Air 4th Gen (WiFi+Cellular) to your Mac.
  2. Navigate to your iPad Air 4th Gen (WiFi+Cellular) in Finder.
  3. Hold the Option or Alt key and click "Restore".
  4. Select the iPad_Fall_2020_17.1.1_21B91_Restore.ipsw file you downloaded.
  5. Wait for the restore to complete and for your iPad Air 4th Gen (WiFi+Cellular) to reboot.

Linux

  1. Install idevicerestore.
  2. Connect your iPad Air 4th Gen (WiFi+Cellular) to your PC.
  3. Open a terminal and navigate to the IPSW file you downloaded, e.g., cd ~/Downloads.
  4. To perform a full erase restore, type idevicerestore -e iPad_Fall_2020_17.1.1_21B91_Restore.ipsw and press Enter.
  5. Wait for the restore to complete and for your iPad Air 4th Gen (WiFi+Cellular) to reboot.