audioOS 9.9.17.1 (build 21K69) is an official Apple over-the-air update for the HomePod (2nd generation), released on 2023-10-25T17:23:59Z. The update package is 274.1 MB. This is a delta (partial) update that requires 17.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b6aea3934b5ec36c913518d2a3c17fac42d0a3fd.zip.