audioOS 9.9.18.2 (build 22K155) is an official Apple over-the-air update for the HomePod (2nd generation), released on 2024-12-11T18:26:05Z. The update package is 1.31 GB. This is a delta (partial) update that requires 17.0 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: 12d195143c1431bb43ad05280441a0a965e4041005f26a8542f1d21581461ae5.aea.