audioOS 9.9.17.4 (build 21L227) is an official Apple over-the-air update for the HomePod mini, released on 2024-03-07T18:16:30Z. The update package is 1.19 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: 8ccfb54a2ca10ca42849649442ce7f11b3ec9282.zip.