IPSW · iPadOS
iPadOS 17.5.1 IPSW Download (21F90)
Build 21F90, released May 20, 2024 — restore images for 24 iPads, straight from Apple's servers.
Choose your iPad
24 devices. Each row is one file on Apple's CDN.
iPad14,8, iPad14,9 7.78 GBiPad_Spring_2024_17.5.1_21F90_Restore.ipsw SHA-256 a9c1096b2265331a1aa7e52a051e71e7b161557c78026f1b7c5616865bafce20 
iPad14,10, iPad14,11 7.78 GBiPad_Spring_2024_17.5.1_21F90_Restore.ipsw SHA-256 a9c1096b2265331a1aa7e52a051e71e7b161557c78026f1b7c5616865bafce20 
iPad16,3, iPad16,4 8.11 GBiPad16,3,iPad16,4,iPad16,5,iPad16,6_17.5.1_21F90_Restore.ipsw SHA-256 e7457772143bbede6c624309a53490b33ec846c4e876a1662f46d0d5bfb214bd 
iPad16,5, iPad16,6 8.11 GBiPad16,3,iPad16,4,iPad16,5,iPad16,6_17.5.1_21F90_Restore.ipsw SHA-256 e7457772143bbede6c624309a53490b33ec846c4e876a1662f46d0d5bfb214bd 
iPad13,18, iPad13,19 7.64 GBiPad_Fall_2022_17.5.1_21F90_Restore.ipsw SHA-256 6085bbf5a781fc1a4b69578531edc744d16163ec54f2b4bba3fa63c78cee0b66 
iPad14,3, iPad14,4 7.82 GBiPad14,3,iPad14,4,iPad14,5,iPad14,6_17.5.1_21F90_Restore.ipsw SHA-256 183e735b187ea3f73e4b3dad13fc2a92e548f6f07e4d4fbba2f8150c18fdf83c 
iPad14,5, iPad14,6 7.82 GBiPad14,3,iPad14,4,iPad14,5,iPad14,6_17.5.1_21F90_Restore.ipsw SHA-256 183e735b187ea3f73e4b3dad13fc2a92e548f6f07e4d4fbba2f8150c18fdf83c 
iPad13,16, iPad13,17 7.64 GBiPad_Spring_2022_17.5.1_21F90_Restore.ipsw SHA-256 b976ee550803cd95ade6a649642db6ced4d1edb4d13b76ecf78a65d39830e0ad 
iPad12,1, iPad12,2 7.39 GBiPad_10.2_2021_17.5.1_21F90_Restore.ipsw SHA-256 040329805cbac420b241d4451555fa9a176f7f6e3c23f00348a5a0c033b28d3c 
iPad14,1, iPad14,2 7.63 GBiPad_Fall_2021_17.5.1_21F90_Restore.ipsw SHA-256 fe076253b47cee018751adf6fca19a2a0d472f68166382c7f5af228828771858 
iPad13,4, iPad13,5, iPad13,6, iPad13,7 7.76 GBiPad_Pro_Spring_2021_17.5.1_21F90_Restore.ipsw SHA-256 df2e80f6125bb2686e3866bf839f6a8e90cae068477ccde9f5b7b05f0d88e633 
iPad13,8, iPad13,9, iPad13,10, iPad13,11 7.76 GBiPad_Pro_Spring_2021_17.5.1_21F90_Restore.ipsw SHA-256 df2e80f6125bb2686e3866bf839f6a8e90cae068477ccde9f5b7b05f0d88e633 
iPad13,1, iPad13,2 7.52 GBiPad_Fall_2020_17.5.1_21F90_Restore.ipsw SHA-256 90d9a72cbf0d03fb83067c25a212ec8f8cc5aba26da581ab7549505863bd6661 
iPad11,6, iPad11,7 7.54 GBiPad_10.2_2020_17.5.1_21F90_Restore.ipsw SHA-256 4963f3728c00330b10d145a942ab883b42683fb848ce3ecc4771d970ee79fbe0 
iPad8,9, iPad8,10 7.88 GBiPad_Pro_A12X_A12Z_17.5.1_21F90_Restore.ipsw SHA-256 7f30f40ea9632065d58e209562b8b077d670176e1ffc06d00fe38edd35c4fc8e 
iPad8,11, iPad8,12 7.88 GBiPad_Pro_A12X_A12Z_17.5.1_21F90_Restore.ipsw SHA-256 7f30f40ea9632065d58e209562b8b077d670176e1ffc06d00fe38edd35c4fc8e 
iPad7,11, iPad7,12 6.86 GBiPad_10.2_17.5.1_21F90_Restore.ipsw SHA-256 64c3b852d1e9e7abe695c9c5d8c676294778ed02519e13778c1afed96d3317cf 
iPad11,3, iPad11,4 7.58 GBiPad_Spring_2019_17.5.1_21F90_Restore.ipsw SHA-256 66b1316cfa8e7bc74874a5627fc015642253d6b03a61f2cda4825714a54c6811 
iPad11,1, iPad11,2 7.58 GBiPad_Spring_2019_17.5.1_21F90_Restore.ipsw SHA-256 66b1316cfa8e7bc74874a5627fc015642253d6b03a61f2cda4825714a54c6811 
iPad8,1, iPad8,2, iPad8,3, iPad8,4 7.88 GBiPad_Pro_A12X_A12Z_17.5.1_21F90_Restore.ipsw SHA-256 7f30f40ea9632065d58e209562b8b077d670176e1ffc06d00fe38edd35c4fc8e 
iPad8,5, iPad8,6, iPad8,7, iPad8,8 7.88 GBiPad_Pro_A12X_A12Z_17.5.1_21F90_Restore.ipsw SHA-256 7f30f40ea9632065d58e209562b8b077d670176e1ffc06d00fe38edd35c4fc8e 
iPad7,5, iPad7,6 6.85 GBiPad_64bit_TouchID_ASTC_17.5.1_21F90_Restore.ipsw SHA-256 b4b44d0d8ce597d8e0d8d910384ba18fc2c253c9f3fea17277d14bd41990792e 
iPad7,3, iPad7,4 6.84 GBiPad_Pro_HFR_17.5.1_21F90_Restore.ipsw SHA-256 d23b901f4193c06c018a844663915fd7f555dbbc51aa006b188848bba76ed1ca 
iPad7,1, iPad7,2 6.84 GBiPad_Pro_HFR_17.5.1_21F90_Restore.ipsw SHA-256 d23b901f4193c06c018a844663915fd7f555dbbc51aa006b188848bba76ed1ca No device matches.
21F90How to install iPadOS 17.5.1 from the IPSW
Four steps, and the one that matters most is the first.
Back up first
A restore erases the device. Make an archived backup in Finder or the Apple Devices app — an iCloud backup taken on a newer version cannot be restored onto an older one. Our backup guide covers the difference.
Get the file for your exact model
Check Settings → General → About → Model Name, then download the IPSW for that device. The download shows the file size; compare it with the SHA-256 under Details if you want to be certain the file is intact.
Restore in Finder or Apple Devices
Connect with a cable, select the device, then hold Option (Mac) or Shift (Windows) and click Restore to choose the .ipsw. Update keeps your data but only works upward; Restore erases and is how you downgrade.
Set up or restore your backup
After the restore the device starts fresh. Restore the backup you made — only if it came from the same or an older version than the one you just installed.
Questions? Answers.
Can I restore iPadOS 17.5.1 today?
Not at the moment — Apple has stopped signing 21F90, so a restore will be rejected at the final step. The files remain here for reference and for signed re-releases.
Which is the right file for my device?
Match the identifier in Settings → General → About (or under the model's name here) against the one on each row. Wi-Fi and Cellular iPads share a file; different generations never do. Restoring the wrong device's IPSW simply fails — it cannot damage the device.
What does "signed" mean?
Apple's servers must approve a firmware before a device will accept it, and Apple only approves the builds it is currently shipping. A signed file can be restored today; an unsigned one is rejected at the end of the process, however you obtained it. Signing status changes without notice, usually within days of a newer release, which is why this catalogue rechecks it automatically.
Will I lose my data?
A Restore erases the device — that is what makes a downgrade possible. An Update with an IPSW keeps your data, but only when moving to a newer version. Either way, make an archived backup on a computer first; an iCloud backup taken on a newer version will not restore onto an older one.