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

MacBook Pro (M1 Max, 16-inch, 2021) · macOS 13.5.1

22G90Signed

Catalog data · Last updated: Oct 21, 2026, 8:57 PM UTC

Restore IPSW for MacBook Pro (M1 Max, 16-inch, 2021): macOS 13.5.1, build 22G90.

Firmware information

Version: macOS 13.5.1
Build: 22G90
IPSW: Mac restore IPSW, not a macOS installer
Size: 12.01 GB
Release date: Aug 17, 2023, 5:52 PM UTC
File name: UniversalMac_13.5.1_22G90_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_13.5.1_22G90_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-256b16966311b54aa5249cd2ee909e9854e0923c3f850e29b050614537d7abe657e

SHA-1206a5a4b3bd80852ea1789e27e5764a56b9b11e2

MD591ba142e818d5bab5350b3cac70b0c9a