audioOS 9.9.17.0 (build 21J354) is an official Apple over-the-air update for the HomePod mini, released on 2023-09-18T17:26:40Z. The update package is 1.52 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: 05f5aa34e81d8fa58d7dd3ea6cde1c370836868b.zip.