Download audioOS 15.4.1 Build 19L452 IPSW Firmware Restore Files
Download the IPSW audioOS 15.4.1 (Build 19L452) firmware file released at 31 March 2022 intended to restore HomePod mini via iTunes. IPSW audioOS 15.4.1 build 19L452 is unsigned by Apple to update Apple device software.
