iPhone XS Max iPhone11,6

IPSW Unsigned 21D50

iOS 17.3

iOS

Version

17.3

Build ID

21D50

File Size

7.10 GB

Release Date

2024-01-22

Last Updated

2024-01-13

Download IPSW

Beta firmware? Download Here →

Want full hardware specs? View iPhone XS Max specs →

About This Firmware

iOS 17.3 (build 21D50) is an official Apple IPSW for the iPhone XS Max, released on 2024-01-22. The file 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 SHA-256 or SHA-1 checksum listed in the Checksums section below.

Filename

iPhone11,2,iPhone11,4,iPhone11,6_17.3_21D50_Restore.ipsw

Checksums

SHA-256 8e6f97db6badae6e3043cf104b3decc9cc3682cdb15097bb1bd13a4dfea6821d

SHA-1 fc57f19e5cb232d8f5b908afb63d5565641e0138

MD5 a5be84c0fbf8df554ba0f19ceeb12dc0

Direct URL

https://updates.cdn-apple.com/2024WinterFCS/fullrestores/042-81289/EC31DD7A-204D-4330-82EE-659B8C92E4BF/iPhone11,2,iPhone11,4,iPhone11,6_17.3_21D50_Restore.ipsw

Other Devices

How to Restore with This IPSW

iTunes / Finder

macOS & Windows

Download the .ipsw file to your computer.
Connect your iPhone XS Max via USB.
Open iTunes (Windows / macOS Mojave and earlier) or Finder (macOS Catalina+) and select your device.
Update (keep data): hold Option (Mac) or Shift (Windows) and click Update, then pick the .ipsw file.
Restore (erase & install): hold Option / Shift and click Restore iPhone…, then pick the .ipsw file.
Wait for the process to finish - do not disconnect.

Restoring will erase all data on the device. Back up first.

3uTools

Windows

Download and install 3uTools from 3u.com.
Connect your iPhone XS Max via USB and trust the computer on the device.
Go to Flash & JB → Easy Flash.
Click Import and select the downloaded .ipsw file.
Choose Flash mode: Update keeps data, Restore wipes the device.
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

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

iPhone 7 / 7 Plus

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

iPhone 6s and earlier

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