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

MacBook Pro (M1 Max, 16-inch, 2021) · macOS 12.0.1

21A559Signed

Catalog data · Last updated: Oct 22, 2026, 6:29 AM UTC

Restore IPSW for MacBook Pro (M1 Max, 16-inch, 2021): macOS 12.0.1, build 21A559.

Firmware information

Version: macOS 12.0.1
Build: 21A559
IPSW: Mac restore IPSW, not a macOS installer
Size: 13.13 GB
Release date: Nov 4, 2021, 9:07 PM UTC
File name: UniversalMac_12.0.1_21A559_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_12.0.1_21A559_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-2563b8fcc1b674542a944fbefb69d29858b0728b1a829d18fd3d3e958691bc693bf

SHA-1aa422d3ef4a8a1a454e66db586fa71a940901943

MD54d27e37df1215c90353a944da731dc14