audioOS 9.9.15.5.1

audioOS 9.9.15.5.1 (build 19L580) is an official Apple over-the-air update for the HomePod (Unknown Model), released on 2022-05-25T17:17:02Z. The update package is 468.29 MB. This is a delta (partial) update that requires 15.2 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 2315139c28e1f6af9b460f53c2ff286d96b4eb8a.zip.