audioOS 9.9.16.6 (build 20M73) is an official Apple over-the-air update for the HomePod, released on 2023-07-24T17:29:56Z. The update package is 1.56 GB. This is a delta (partial) update that requires 13.4.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: eba9a28254d693e4f9c05779d7abb9476fbc353f.zip.