Download tvOS 11.4 Build 15L577 IPSW Firmware Restore Files
Download the IPSW tvOS 11.4 (Build 15L577) firmware file released at 29 May 2018 intended to restore Apple TV 4 (2015) via iTunes. IPSW tvOS 11.4 build 15L577 is unsigned by Apple to update Apple device software.
