audioOS 9.9.16.4.1 (build 20L498) is an official Apple over-the-air update for the HomePod, released on 2023-04-12T17:25:07Z. The update package is 1.56 GB. This is a delta (partial) update that requires 13.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 5505863e3014ae750fdca6eaa9de8df9f7d62c7d.zip.