audioOS 9.9.15.0

audioOS 9.9.15.0 (build 19J346) is an official Apple over-the-air update for the HomePod (Unknown Model), released on 2021-09-20T17:12:12Z. The update package is 1.19 GB. This is a delta (partial) update that requires 14.4 to already be installed on the device — it cannot be applied from scratch. This update is no longer signed by Apple, meaning it can no longer be downloaded and applied on-device through Settings.

The OTA payload file is c5ace1bdc4f23699038a964c46f65997b98a596d.zip.