audioOS 9.9.18.6 (build 22M84) is an official Apple over-the-air update for the HomePod, released on 2025-07-29T17:27:52Z. The update package is 801.45 MB. This is a delta (partial) update that requires 18.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e137298ec183b88e0c22ab5d5df94ee7f9038040.zip.