MacBook Pro (M1 Max, 16-inch, 2021) · MacBookPro18,2

MacBook Pro (M1 Max, 16-inch, 2021) · macOS 15.6.1

24G90Signed

Catalog data · Last updated: Oct 23, 2026, 7:19 AM UTC

Restore IPSW for MacBook Pro (M1 Max, 16-inch, 2021): macOS 15.6.1, build 24G90.

Firmware information

Version: macOS 15.6.1
Build: 24G90
IPSW: Mac restore IPSW, not a macOS installer
Size: 15.66 GB
Release date: Aug 20, 2025, 5:44 PM UTC
File name: UniversalMac_15.6.1_24G90_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_15.6.1_24G90_Restore.ipsw

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-2563d87686b691ac765eb6a6b3082b2334e2af9710096a00432dd519af89ff2ea78

SHA-1a19ba56bb931769580060647a466c5b2d09da761

MD52c22273091d69ea84723a1f2d36332f3