audioOS 9.9.15.0 (build 19J6346) is an official Apple over-the-air update for the HomePod, released on 2021-09-20T17:12:04Z. The update package is 1.98 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1e54d198ea9bc9d8473f1fd90ca1ad222f5c0ffb.zip.