audioOS 9.9.18.5

audioOS 9.9.18.5 (build 22L572) is an official Apple over-the-air update for the HomePod (2nd generation), released on 2025-05-12T17:13:47Z. The update package is 384 MB. This is a delta (partial) update that requires 18.4.1 to already be installed on the device - it cannot be applied from scratch. This update is currently signed by Apple, so it can be applied directly from Settings › General › Software Update.

The OTA payload file is 78bdd334072a1d9ad84c0d8ad9cf848cb90562222c51e192da1c4e7ed9e01c42.aea.