audioOS 9.9.15.6 (build 19M65) is an official Apple over-the-air update for the HomePod, released on 2022-07-20T17:23:49Z. The update package is 188.64 MB. This is a delta (partial) update that requires 15.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 28f9b0597917b4948efbe5d9259a024abc7366e4.zip.