Apple Virtual Machine 1 · VirtualMac2,1

Apple Virtual Machine 1 · macOS 13.3.1

22E261Unsigned

Catalog data · Last updated: Oct 21, 2026, 5:26 PM UTC

Restore IPSW for Apple Virtual Machine 1: macOS 13.3.1, build 22E261.

Firmware information

Version: macOS 13.3.1
Build: 22E261
IPSW: Mac restore IPSW, not a macOS installer
Size: 11.85 GB
Release date: Apr 7, 2023, 5:14 PM UTC
File name: UniversalMac_13.3.1_22E261_Restore.ipsw
Download host: updates.cdn-apple.com

IPSW download

Check the model and signing status before downloading.

Download IPSW

Download hostupdates.cdn-apple.comUniversalMac_13.3.1_22E261_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. This is Mac restore firmware, not a regular macOS installer. The restore steps depend on the model.

Checksum

SHA-2566e9d9b30528ec951d8a377173b355932647194c326347efc5e54ade1fe71cbc8

SHA-1e8e862f31c6390f5d66c37139dc84493639e14d0

MD5238108a4bf8e47b387af0d784680c370