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 412.76 MB. This is a delta (partial) update that requires 15.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 7ac012012cd195d24cb002f2b727ecc58c674a45.zip.