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 iMac 24-inch (M1, Four Ports, 2021) via iTunes. IPSW MacOS 11.5.1 build 20G80 is signed by Apple to update Apple device software.
