IPSW Downloads

iPadOS 17.5.1 - 21F90 for iPad Air 4th Gen (WiFi+Cellular)

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

Release Date20 May 2024
Upload Date17 May 2024
File NameiPad_Fall_2020_17.5.1_21F90_Restore.ipsw
File Size7.01 GB
SHA256sum90d9a72cbf0d03fb83067c25a212ec8f8cc5aba26da581ab7549505863bd6661
MD5sum58f0643ef467e9554c1bb3c58599639b
SHA1sum9150827c5163d851daa2f865cc14de958c31bc04
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_17.5.1_21F90_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_17.5.1_21F90_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_17.5.1_21F90_Restore.ipsw and press Enter.
  5. Wait for the restore to complete and for your iPad Air 4th Gen (WiFi+Cellular) to reboot.