audioOS 9.9.15.5.1 (build 19L580) is an official Apple over-the-air update for the HomePod mini, released on 2022-05-25T17:17:06Z. The update package is 1.01 GB. This is a delta (partial) update that requires 14.7 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3e379d2351c152669d823911104cdbf3a24a1481.zip.