audioOS 9.9.17.0 (build 21J354) is an official Apple over-the-air update for the HomePod, released on 2023-09-18T17:26:10Z. The update package is 1.78 GB. This is a delta (partial) update that requires 14.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: ebe49bb3a5adc8522998632ee5b35c93e1e9bc93.zip.