audioOS 9.9.15.1 (build 19J572) is an official Apple over-the-air update for the HomePod mini, released on 2021-10-25T17:12:28Z. The update package is 1.12 GB. This is a delta (partial) update that requires 14.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d9f3e6aa6c01657c2a48fbd8550f5a4fe59ac39e.zip.