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 1004.66 MB. This is a delta (partial) update that requires 18.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 88b19b6b576749182db84b5e12f56e16d98eefd0.zip.