iBridge2,21 · iBridge2,21

iBridge2,21 · bridgeOS 4.5

17P5290Unsigned

Catalog data · Last updated: Oct 22, 2026, 2:28 AM UTC

Restore IPSW for iBridge2,21: bridgeOS 4.5, build 17P5290.

Firmware information

Version: bridgeOS 4.5
Build: 17P5290
IPSW: Restore IPSW
Size: 0.49 GB
Release date: May 26, 2020, 8:43 PM UTC
File name: iBridge2,1,iBridge2,10,iBridge2,11,iBridge2,12,iBridge2,14,iBridge2,15,iBridge2,16,iBridge2,21,iBridge2,3,iBridge2,4,iBridge2,5,iBridge2,6,iBridge2,7,iBridge2,8_4.5_17P5290_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,iBridge2,11,iBridge2,12,iBridge2,14,iBridge2,15,iBridge2,16,iBridge2,21,iBridge2,3,iBridge2,4,iBridge2,5,iBridge2,6,iBridge2,7,iBridge2,8_4.5_17P5290_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-2561074ed3fe3adcb39c6353d8d4f16fb8f401c144481c5b128baab5bf54c971d35

SHA-1327bfff69aa599a72995b58f01c4e89541cdda4f

MD50b4cc82968d6b2ab0bff7ea10e62b5b4