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

MacBook Pro (M1 Max, 16-inch, 2021) · macOS 26.1

25B78Signed

Catalog data · Last updated: Oct 21, 2026, 4:25 PM UTC

Restore IPSW for MacBook Pro (M1 Max, 16-inch, 2021): macOS 26.1, build 25B78.

Firmware information

Version: macOS 26.1
Build: 25B78
IPSW: Mac restore IPSW, not a macOS installer
Size: 17.43 GB
Release date: Nov 3, 2025, 9:34 PM UTC
File name: UniversalMac_26.1_25B78_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_26.1_25B78_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-256e0217b3cd0f2edb9ab3294480bef5af2a0be43e86d84a15fab6bca31d3802ee8

SHA-1479d6bb78f069062ca016d496fd50804b673e815

MD5e270ede6a1eba02253ac42bcd76dab4b