audioOS 9.9.16.5 (build 20L563) is an official Apple over-the-air update for the HomePod (2nd generation), released on 2023-05-18T17:11:48Z. The update package is 216.8 MB. This is a delta (partial) update that requires 16.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 681c714ba461e7411c81ee6404348915f118f4a0.zip.