Download MacOS 11.2.3 Build 20D91 IPSW Firmware Restore Files
Download the IPSW MacOS 11.2.3 (Build 20D91) firmware file released at 08 March 2021 intended to restore MacBook Air (M1, Late 2020) via iTunes. IPSW MacOS 11.2.3 build 20D91 is signed by Apple to update Apple device software.
