audioOS 9.9.16.4.1 (build 20L498) is an official Apple over-the-air update for the HomePod (2nd generation), released on 2023-04-12T17:25:29Z. The update package is 708.88 MB. This is a delta (partial) update that requires 16.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: baf667227d585851567309c54db05d938ee4aa29.zip.