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Home / Devices / iPhone 14 Pro Max / 21B74

About This Firmware

iOS 17.1 (build 21B74) is an official Apple IPSW for the iPhone 14 Pro Max, released on 2023-10-25. The download is 7.43 GB and is served directly from Apple's CDN. This firmware is no longer signed by Apple. Standard downgrades are not possible, but the file remains available for reference and advanced use.

Verify the download using the checksums below.

Filename

iPhone15,3_17.1_21B74_Restore.ipsw

Checksums

SHA-256 303596d47a428ef079d628a76bd267e861dade1103f0855b0a4f251455a4d6ee
SHA-1 ce753e8506051a76bf7984eb059e1d9b2572ff58
MD5 aa6c5d91f33480e9271b1dcde8e9da38

Direct URL

https://updates.cdn-apple.com/2023FallFCS/fullrestores/042-07884/5889B9B5-D443-447A-A46A-CB4A68FD282C/iPhone15,3_17.1_21B74_Restore.ipsw
Download IPSW

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How to Restore with This IPSW

iTunes / Finder

macOS & Windows
  1. Download the .ipsw file to your computer.
  2. Connect your iPhone 14 Pro Max via USB.
  3. Open iTunes (Windows / macOS Mojave and earlier) or Finder (macOS Catalina+) and select your device.
  4. Update (keep data): hold Option (Mac) or Shift (Windows) and click Update, then pick the .ipsw file.
  5. Restore (erase & install): hold Option / Shift and click Restore iPhone…, then pick the .ipsw file.
  6. Wait for the process to finish - do not disconnect.
Restoring will erase all data on the device. Back up first.

3uTools

Windows
  1. Download and install 3uTools from 3u.com.
  2. Connect your iPhone 14 Pro Max via USB and trust the computer on the device.
  3. Go to Flash & JB > Easy Flash.
  4. Click Import and select the downloaded .ipsw file.
  5. Choose Flash mode: Update keeps data, Restore wipes the device.
  6. Click Flash and wait for the progress bar to complete - do not disconnect.
Only flash firmware that matches your exact device model.

DFU Mode

Recovery tip

If your device is stuck in a boot loop or iTunes/Finder does not recognise it, enter DFU mode first, then select the .ipsw file as normal.

iPhone 8 / X and later

  1. Quickly press & release Volume Up
  2. Quickly press & release Volume Down
  3. Hold Side button until screen goes black
  4. Hold Side + Volume Down for 5 s
  5. Release Side, hold Volume Down 5 more s
  6. Black screen = DFU active

iPhone 7 / 7 Plus

  1. Hold Sleep/Wake + Volume Down for 8 s
  2. Release Sleep/Wake, keep holding Volume Down for 5 s
  3. Black screen = DFU active

iPhone 6s and earlier

  1. Hold Sleep/Wake + Home for 8 s
  2. Release Sleep/Wake, keep holding Home for 5 s
  3. Black screen = DFU active
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