Apple Mac Studio (M1 Ultra) macOS 12.3 firmware

Apple Mac Studio (M1 Ultra) Signed

macOS 12.3

Build 21E230 For Mac13,2, J375dAP

Global · IPSW

A newer version is available for this region: macOS 27.2 beta 4

Download 12.9 GB

Downloads from updates.cdn-apple.com.

File details

Device: Apple Mac Studio (M1 Ultra)
OS: macOS 12.3
Region: Global
Type: IPSW
Install with: How to restore a Mac with Apple silicon (IPSW)
Released: 14 Mar 2022
Size: 12.9 GB
File name: UniversalMac_12.3_21E230_Restore.ipsw
MD5: ebc5b2018be0ae7833d528f22e4d2249
SHA-1: b9e895b403586591040864d23643132c20ca7913
SHA-256: 0ceb505082b254d14a7eef406b48671c0abd7c943d25fa75ea2807ea17504006

After downloading, compare the checksum with the one above. If they differ, the file is incomplete — download it again.

Before you download

Make sure your device’s model number is one of: Mac13,2, J375dAP. You will find it in Settings → About phone, or on the box.
This file is for the Global region. Installing another region’s firmware can remove features or block updates.
Apple devices can only restore versions marked “Signed”.
Back up your photos, contacts and files first, and charge the battery above 50%.

How to install

Macs with Apple silicon (M1 and newer) and Intel Macs with a T2 chip can be restored from an IPSW using a second Mac and Apple Configurator. This reinstalls the firmware and macOS and erases the Mac.

Read the guide: How to restore a Mac with Apple silicon (IPSW)

Other Apple Mac Studio (M1 Ultra) versions

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