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 1.21 GB. This is a delta (partial) update that requires 17.4 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: 6fc7c738db5717939aa9d5a34a1c63ba6a00fcf2.zip.