audioOS 9.9.16.3 (build 20K649) is an official Apple over-the-air update for the HomePod, released on 2023-01-24T18:07:54Z. The update package is 1.14 GB. This is a delta (partial) update that requires 15.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 5e166162e51d2e90b78db02a06321f45bbb742e8.zip.