audioOS 9.9.18.5 (build 22L572) is an official Apple over-the-air update for the HomePod, released on 2025-05-12T17:13:27Z. The update package is 1.2 GB. This is a delta (partial) update that requires 17.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9d75764b125807bdd9d83951a8faeac0eaf24730.zip.