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

MacBook Pro (M1 Max, 16-inch, 2021) · macOS 26.4

25E246Signed

Catalog data · Last updated: Oct 22, 2026, 4:43 AM UTC

Restore IPSW for MacBook Pro (M1 Max, 16-inch, 2021): macOS 26.4, build 25E246.

Firmware information

Version: macOS 26.4
Build: 25E246
IPSW: Mac restore IPSW, not a macOS installer
Size: 18.38 GB
Release date: Mar 24, 2026, 6:12 PM UTC
File name: UniversalMac_26.4_25E246_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_26.4_25E246_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-256960e6a473062180dadbb64f7951442fcce8007f7774a96962a24ed5bc3402cae

SHA-1177baf85518c6e9cebf83990e11e59259b5c97dd

MD5383fb9aca4dc5f271e675c77d43d0854