audioOS 9.9.18.3 (build 22K557) is an official Apple over-the-air update for the HomePod, released on 2025-01-27T18:19:42Z. The update package is 1.3 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: 54c059905b907f6a50edc55b7367e9af38e3fc9d.zip.