audioOS 9.9.17.3

audioOS 9.9.17.3 (build 21K646) is an official Apple over-the-air update for the HomePod (2nd generation), released on 2024-01-22T18:29:36Z. The update package is 1.14 GB. This is a delta (partial) update that requires 16.4 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 1ef26df43f6577aee1f4a389247a74de7be3b8fc.zip.