audioOS 9.9.16.4 (build 20L497) is an official Apple over-the-air update for the HomePod mini, released on 2023-03-27T17:13:28Z. The update package is 563.52 MB. This is a delta (partial) update that requires 16.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4fd3ff81cae41e8881a29696ab46b29830d6a708.zip.