iPhone 12 Pro Max · iPhone13,4

iPhone 12 Pro Max · iOS 17.1.1

21B91Unsigned

Catalog data · Last updated: Oct 24, 2026, 2:23 AM UTC

Restore IPSW for iPhone 12 Pro Max: iOS 17.1.1, build 21B91.

Firmware information

Version: iOS 17.1.1
Build: 21B91
IPSW: Restore IPSW
Size: 7.28 GB
Release date: Nov 8, 2023, 6:58 PM UTC
File name: iPhone13,4_17.1.1_21B91_Restore.ipsw
Download host: updates.cdn-apple.com

IPSW download

Check the model and signing status before downloading.

Download IPSW

Download hostupdates.cdn-apple.comiPhone13,4_17.1.1_21B91_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-2566d0fdc965d5ede25baaae36a03914109520225e617c8ae50fd461f293135fa34

SHA-1b3357869ea02564a8bb078e3a19a0dfb3827e1c4

MD5fd6b63aceba26bef11cbda4c72b23f40