Apple Virtual Machine 1 · VirtualMac2,1

Apple Virtual Machine 1 · macOS 12.5.1

21G83Unsigned

Catalog data · Last updated: Oct 21, 2026, 7:26 PM UTC

Restore IPSW for Apple Virtual Machine 1: macOS 12.5.1, build 21G83.

Firmware information

Version: macOS 12.5.1
Build: 21G83
IPSW: Mac restore IPSW, not a macOS installer
Size: 13.12 GB
Release date: Aug 17, 2022, 5:34 PM UTC
File name: UniversalMac_12.5.1_21G83_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_12.5.1_21G83_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-25697a5c61e21e9ddf25158ec9dca67b482205f9dd311d274a1a59915b4bb042c83

SHA-1478eca5466157a6eef5cdba8f75884b224c6d3f6

MD53d5f06ed500a29f29f82318e0e7fbe4b