MacBook Pro (M1 Max, 14-inch, 2021) · MacBookPro18,4

MacBook Pro (M1 Max, 14-inch, 2021) · macOS 15.3.1

24D70Signed

Catalog data · Last updated: Oct 21, 2026, 11:27 PM UTC

Restore IPSW for MacBook Pro (M1 Max, 14-inch, 2021): macOS 15.3.1, build 24D70.

Firmware information

Version: macOS 15.3.1
Build: 24D70
IPSW: Mac restore IPSW, not a macOS installer
Size: 15.4 GB
Release date: Feb 10, 2025, 6:28 PM UTC
File name: UniversalMac_15.3.1_24D70_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_15.3.1_24D70_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-256559a78b75adc6bec77665b17db0e166eba326b04fc534e2a086253be92e043b0

SHA-1c2b5bca53c6cf475e7a2a0b6d6c0db19477d69eb

MD58bf666a8d89382b396a55d02594144eb