audioOS 9.9.18.5 (build 22L572) is an official Apple over-the-air update for the HomePod, released on 2025-05-12T17:13:20Z. The update package is 1.76 GB. This is a delta (partial) update that requires 15.4.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3e95f26cee005fb0aec2f7be97ddadc14ae55365.zip.