audioOS 9.9.15.4.1 (build 19L452) is an official Apple over-the-air update for the HomePod mini, released on 2022-03-31T17:16:12Z. The update package is 1.01 GB. This is a delta (partial) update that requires 14.6 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 36f072bde7e6e02fe519e36a9993a021065e9ed6.zip.