audioOS 9.9.15.4.1 (build 19L6452) is an official Apple over-the-air update for the HomePod, released on 2022-03-31T17:15:54Z. The update package is 1.92 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: 478719d394f6de3e9a526e4bf4b44e904745d82a.zip.