audioOS 9.9.18.4 (build 22L255) is an official Apple over-the-air update for the HomePod mini, released on 2025-03-31T17:29:41Z. The update package is 1.76 GB. This is a delta (partial) update that requires 15.5.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: be7d934631e5199ca663de12612ffaab0a2c9a53.zip.