audioOS 9.9.18.3 (build 22K557) is an official Apple over-the-air update for the HomePod, released on 2025-01-27T18:19:43Z. The update package is 1.29 GB. This is a delta (partial) update that requires 17.1.1 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: 5256b5b285e6e6abf0f386539a75961bbc2f25d6.zip.