audioOS 9.9.17.2 (build 21K365) is an official Apple over-the-air update for the HomePod, released on 2023-12-11T18:21:36Z. The update package is 1.54 GB. This is a delta (partial) update that requires 15.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d01032652dbdb7b782e103d7cc1e47cd872944e0.zip.