IPSW Downloads

iOS 17.2.1 - 21C66 for iPhone 14 Pro Max

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

Release Date19 December 2023
Upload Date16 December 2023
File NameiPhone15,3_17.2.1_21C66_Restore.ipsw
File Size7.36 GB
SHA256sum956f4a84ba1de91e9fdb8c4c3f6f2ad5adbefcc4217be62f67a889381258379a
MD5sumad77a9838c94d25fe94c3382d8d319e4
SHA1sum636870f78995cb5aacd98a6e32f49b03c4035860
IdentifieriPhone15,3

Installation Instructions

Windows

  1. Install the latest version of iTunes from the Microsoft Store.
  2. Connect your iPhone 14 Pro Max to your PC.
  3. Open iTunes and navigate to your iPhone 14 Pro Max.
  4. Hold the Shift key and click "Restore".
  5. Select the iPhone15,3_17.2.1_21C66_Restore.ipsw file you downloaded.
  6. Wait for the restore to complete and for your iPhone 14 Pro Max to reboot.

macOS

  1. Connect your iPhone 14 Pro Max to your Mac.
  2. Navigate to your iPhone 14 Pro Max in Finder.
  3. Hold the Option or Alt key and click "Restore".
  4. Select the iPhone15,3_17.2.1_21C66_Restore.ipsw file you downloaded.
  5. Wait for the restore to complete and for your iPhone 14 Pro Max to reboot.

Linux

  1. Install idevicerestore.
  2. Connect your iPhone 14 Pro Max 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 iPhone15,3_17.2.1_21C66_Restore.ipsw and press Enter.
  5. Wait for the restore to complete and for your iPhone 14 Pro Max to reboot.