audioOS 9.9.18.5 (build 22L572) is an official Apple over-the-air update for the HomePod (2nd generation), released on 2025-05-12T17:13:44Z. The update package is 1.28 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: a82fa0445e9c4ef9cc1c42c2cfb4c94daad99cd3103e66a5546b614f658ed59c.aea.