audioOS 9.9.15.6 (build 19M65) is an official Apple over-the-air update for the HomePod, released on 2022-07-20T17:23:43Z. The update package is 1.27 GB. This is a delta (partial) update that requires 13.4.8 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d4fbb455af4779e915e355926f37b5b987554776.zip.