audioOS 9.9.17.0

audioOS 9.9.17.0 (build 21J354) is an official Apple over-the-air update for the HomePod, released on 2023-09-18T17:26:25Z. The update package is 1.5 GB. This is a delta (partial) update that requires 15.5.1 to already be installed on the device - it cannot be applied from scratch. This update is no longer signed by Apple, meaning it can no longer be downloaded and applied on-device through Settings.

The OTA payload file is a5c61f4d83c259b1cd8dee004c439108854d8fae.zip.