audioOS 9.9.12.2 (build 16E227) is an official Apple over-the-air update for the HomePod, released on 2019-03-25T19:21:09Z. The update package is 1.42 GB. This is a delta (partial) update that requires 11.4.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8a09772e2a318e3f975e826cf762a43e8b06ac4f.zip.