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

MacBook Pro (M1 Max, 16-inch, 2021) · macOS 27.0.1

26A434Signed

Catalog data · Last updated: Oct 24, 2026, 7:37 AM UTC

Restore IPSW for MacBook Pro (M1 Max, 16-inch, 2021): macOS 27.0.1, build 26A434.

Firmware information

Version: macOS 27.0.1
Build: 26A434
IPSW: Mac restore IPSW, not a macOS installer
Size: 24.81 GB
Release date: Sep 28, 2026, 5:24 PM UTC
File name: UniversalMac_27.0.1_26A434_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_27.0.1_26A434_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-2562f016638293c3e641b8b25391a76fbc16563b3711915a5551cf8aa0f5598a5c1

SHA-17e020710acade1911309aa73901ed5a92790bafc

MD54b8c55bbeefa2aebe3a112f89822ecc4