audioOS 9.9.15.4.1

audioOS 9.9.15.4.1 (build 19L452) is an official Apple over-the-air update for the HomePod (Unknown Model), released on 2022-03-31T17:16:06Z. The update package is 1.15 GB. This is a delta (partial) update that requires 14.4 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 643d30e4f2e18c47fba7ff24a87586cbc0be207c.zip.