Apple Virtual Machine 1 · VirtualMac2,1

Apple Virtual Machine 1 · macOS 15.1.1

24B91Unsigned

Catalog data · Last updated: Oct 21, 2026, 6:11 PM UTC

Restore IPSW for Apple Virtual Machine 1: macOS 15.1.1, build 24B91.

Firmware information

Version: macOS 15.1.1
Build: 24B91
IPSW: Mac restore IPSW, not a macOS installer
Size: 14.67 GB
Release date: Nov 19, 2024, 6:19 PM UTC
File name: UniversalMac_15.1.1_24B91_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_15.1.1_24B91_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-256f94fb7f03c9fe52d573ff58db9e2c8481cec25fd1a29fe4932f60a6c8c1151e7

SHA-1b515c07a7322d27f9bc672ef40bc6e3d1b09bea3

MD5bfc093317a8a9a5717123c5ffe18009c