audioOS 9.9.17.6 (build 21M71) is an official Apple over-the-air update for the HomePod (2nd generation), released on 2024-07-29T20:28:11Z. The update package is 739.25 MB. This is a delta (partial) update that requires 17.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 7ee8030c4add4e330e09b6f7a3da579bb7a77a8c.zip.