Download MacOS 12.1 Build 21C52 IPSW Firmware Restore Files
Download the IPSW MacOS 12.1 (Build 21C52) firmware file released at 13 December 2021 intended to restore MacBook Air (M1, Late 2020) via iTunes. IPSW MacOS 12.1 build 21C52 is signed by Apple to update Apple device software.
