audioOS 9.9.18.5 (build 22L572) is an official Apple over-the-air update for the HomePod, released on 2025-05-12T17:13:28Z. The update package is 787.2 MB. This is a delta (partial) update that requires 18.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 50646e1e8f6adbfe4e2dc423faa10f0a9a8161a7.zip.