audioOS 9.9.18.6 (build 22M84) is an official Apple over-the-air update for the HomePod, released on 2025-07-29T17:27:53Z. The update package is 273.7 MB. This is a delta (partial) update that requires 18.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6016ae59f6d314ac25ea5c7e16ea6e2462277a9b.zip.