iPhone 12 Pro Max · iPhone13,4

iPhone 12 Pro Max · iOS 17.5.1

21F90Unsigned

Catalog data · Last updated: Oct 24, 2026, 7:24 AM UTC

Restore IPSW for iPhone 12 Pro Max: iOS 17.5.1, build 21F90.

Firmware information

Version: iOS 17.5.1
Build: 21F90
IPSW: Restore IPSW
Size: 7.42 GB
Release date: May 20, 2024, 6:01 PM UTC
File name: iPhone13,4_17.5.1_21F90_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_17.5.1_21F90_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-256cc4e44492cd435b2abc5ad42ce01ed8541db8048c01a93bec1184992e4ce35c5

SHA-158e1e16c092be767290db1cd1d19df01790b82d9

MD5f721ba76c1110c2fe21ccbc0ffba05b2