audioOS 9.9.15.5 (build 19L570) is an official Apple over-the-air update for the HomePod mini, released on 2022-05-16T18:24:07Z. The update package is 182.47 MB. This is a delta (partial) update that requires 15.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6bb73c484a6ebcaea84b78ff4cd6d82f5ba59de2.zip.