audioOS 9.9.18.3 (build 22K557) is an official Apple over-the-air update for the HomePod, released on 2025-01-27T18:19:35Z. The update package is 2.03 GB. This is a delta (partial) update that requires 13.4.6 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: 0d1df1ec4d976e86d65230b65e365d40c34e50e1.zip.