audioOS 9.9.18.4 (build 22L255) is an official Apple over-the-air update for the HomePod mini, released on 2025-03-31T17:29:44Z. The update package is 1.27 GB. This is a delta (partial) update that requires 17.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 7aa31f14b9b3009039195cc1215668a3deeaa8f7.zip.