audioOS 9.9.16.4.1 (build 20L498) is an official Apple over-the-air update for the HomePod, released on 2023-04-12T17:25:15Z. The update package is 568.48 MB. This is a delta (partial) update that requires 16.3.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0b8500110b32d092dd4e30b80730e8d65310579c.zip.