audioOS 9.9.17.6 (build 21M71) is an official Apple over-the-air update for the HomePod (2nd generation), released on 2024-07-29T20:28:10Z. The update package is 1.17 GB. This is a delta (partial) update that requires 16.6 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b9c73ed8b7cfb85a2724463a5aea313d1915ced1.zip.