audioOS 9.9.15.1 (build 19J572) is an official Apple over-the-air update for the HomePod mini, released on 2021-10-25T17:12:30Z. The update package is 1.92 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: 771eba9ab0898fd80c232b6fa48d1424933eab8d.zip.