audioOS 9.9.18.4.1 (build 22L261) is an official Apple over-the-air update for the HomePod mini, released on 2025-04-16T17:28:41Z. The update package is 1.44 GB. This is a delta (partial) update that requires 16.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 86f33ad72a27d7d3d115cfb9f2a5e6ba967df08a.zip.