Download MacOS 11.5.1 Build 20G80 IPSW Firmware Restore Files
Download the IPSW MacOS 11.5.1 (Build 20G80) firmware file released at 26 July 2021 intended to restore MacBook Air (M1, Late 2020) via iTunes. IPSW MacOS 11.5.1 build 20G80 is signed by Apple to update Apple device software.
