audioOS 9.9.17.1 (build 21K69) is an official Apple over-the-air update for the HomePod, released on 2023-10-25T17:23:53Z. The update package is 1.5 GB. This is a delta (partial) update that requires 15.6 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d235cbd38296dd5546c439d344ba3a0184952e67.zip.