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 1.19 GB. This is a delta (partial) update that requires 16.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: ea1d3dc6ca2954d59f1606b7283554dcd52900fe.zip.