IPSW Downloads

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

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
IdentifieriPad13,1

Installation Instructions

Windows

  1. Install the latest version of iTunes from the Microsoft Store.
  2. Connect your iPad Air 4th Gen (WiFi) to your PC.
  3. Open iTunes and navigate to your iPad Air 4th Gen (WiFi).
  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) to reboot.

macOS

  1. Connect your iPad Air 4th Gen (WiFi) to your Mac.
  2. Navigate to your iPad Air 4th Gen (WiFi) 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) to reboot.

Linux

  1. Install idevicerestore.
  2. Connect your iPad Air 4th Gen (WiFi) 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) to reboot.