Download MacOS 12.3.1 Build 21E258 IPSW Firmware Restore Files

Download the IPSW MacOS 12.3.1 (Build 21E258) firmware file released at 31 March 2022 intended to restore MacBook Pro (M1 Pro, 16-inch, 2021) via iTunes. IPSW MacOS 12.3.1 build 21E258 is signed by Apple to update Apple device software.

Download MacOS 12.3.1 21E258 IPSW Recovery Firmware file for MacBook Pro (M1 Pro, 16-inch, 2021)

Upload Date	31 March 2022
Filesize	12.92 GB
Identifier	MacBookPro18,1

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