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

MacBook Pro (M1 Max, 16-inch, 2021) · macOS 26.3.1

25D2128Signed

Catalog data · Last updated: Oct 22, 2026, 2:00 PM UTC

Restore IPSW for MacBook Pro (M1 Max, 16-inch, 2021): macOS 26.3.1, build 25D2128.

Firmware information

Version: macOS 26.3.1
Build: 25D2128
IPSW: Mac restore IPSW, not a macOS installer
Size: 18 GB
Release date: Mar 4, 2026, 6:52 PM UTC
File name: UniversalMac_26.3.1_25D2128_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_26.3.1_25D2128_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-2564ff171ba3fa6db4758a2a7cedc8f24d44f4e3de8051a84400984872619abd6bc

SHA-1d7fd6eded02a7534581e4bee5f25ba9784cce408

MD5d928ee10bc9faccb8c88ab971c0a6d03