audioOS 9.9.18.2 (build 22K155) is an official Apple over-the-air update for the HomePod (2nd generation), released on 2024-12-11T18:26:06Z. The update package is 1.22 GB. This is a delta (partial) update that requires 17.6 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: 01abb63d530cdc6e0d9c5c6e0fc5efb016d09a014177bb74af5a66c1f7a1a9cb.aea.