audioOS 9.9.16.4 (build 20L497) is an official Apple over-the-air update for the HomePod mini, released on 2023-03-27T17:13:27Z. The update package is 1.22 GB. This is a delta (partial) update that requires 15.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: cfc6d02069dfab13ec9c6957e5e90128a5668dca.zip.