iBridge2,21 · iBridge2,21

iBridge2,21 · bridgeOS 7.4

20P4252Unsigned

Catalog data · Last updated: Oct 21, 2026, 4:41 PM UTC

Restore IPSW for iBridge2,21: bridgeOS 7.4, build 20P4252.

Firmware information

Version: bridgeOS 7.4
Build: 20P4252
IPSW: Restore IPSW
Size: 0.61 GB
Release date: Mar 28, 2023, 9:05 PM UTC
File name: iBridge2,1,iBridge2,10,iBridge2,12,iBridge2,14,iBridge2,15,iBridge2,16,iBridge2,19,iBridge2,20,iBridge2,21,iBridge2,22,iBridge2,3,iBridge2,4,iBridge2,5,iBridge2,6,iBridge2,7,iBridge2,8_7.4_20P4252_Restore.ipsw
Download host: updates.cdn-apple.com

IPSW download

Check the model and signing status before downloading.

Download IPSW

Download hostupdates.cdn-apple.com

iBridge2,1,iBridge2,10,iBridge2,12,iBridge2,14,iBridge2,15,iBridge2,16,iBridge2,19,iBridge2,20,iBridge2,21,iBridge2,22,iBridge2,3,iBridge2,4,iBridge2,5,iBridge2,6,iBridge2,7,iBridge2,8_7.4_20P4252_Restore.ipsw

The catalog marks this build as unsigned. A normal restore may not be accepted.

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. bridgeOS belongs to the matching Mac hardware and is not a macOS installer.

Checksum

SHA-256b57568b11ffad84793f660a698997f9f96385d3a6eaafdd42810d83be9d32d41

SHA-1f3d7345a3a696465fe2ecbadbf7126db4dfce6bf

MD5baebd87fef9521fc577a604154025560