audioOS 9.9.15.2 (build 19K52) is an official Apple over-the-air update for the HomePod mini, released on 2021-12-13T18:28:32Z. The update package is 1.93 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: dae49eb683740891a4819ffd12db19cc7ebe26f2.zip.