iPhone 15 Pro Max · iPhone16,2

iPhone 15 Pro Max · iOS 17.2.1

21C66Unsigned

Catalog data · Last updated: Oct 23, 2026, 8:22 PM UTC

Restore IPSW for iPhone 15 Pro Max: iOS 17.2.1, build 21C66.

Firmware information

Version: iOS 17.2.1
Build: 21C66
IPSW: Restore IPSW
Size: 7.57 GB
Release date: Dec 19, 2023, 7:27 PM UTC
File name: iPhone16,2_17.2.1_21C66_Restore.ipsw
Download host: updates.cdn-apple.com

IPSW download

Check the model and signing status before downloading.

Download IPSW

Download hostupdates.cdn-apple.comiPhone16,2_17.2.1_21C66_Restore.ipsw

Back up before you restore. A restore can erase the data on the device. The identifier has to match, and a file you can download may still be rejected for restore.

Checksum

SHA-2569cd3d719754b848f56b702fe8c9621458671d7fd590d0a6f674340e7fa83ac4f

SHA-1100203f832f028723a23b72730e14868b5bd2c48

MD54c0a584f14b717905dfed5d84b0a9697