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 995.82 MB. This is a delta (partial) update that requires 18.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 12a8a84e631bcaf776b8889dfcf479251c5bdfc9.zip.