audioOS 9.9.17.3 (build 21K646) is an official Apple over-the-air update for the HomePod, released on 2024-01-22T18:29:29Z. The update package is 379.73 MB. This is a delta (partial) update that requires 17.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e86e5efdf9c5473b467be95491ea393ac8d4abd6.zip.