audioOS 9.9.17.4 (build 21L227) is an official Apple over-the-air update for the HomePod mini, released on 2024-03-07T18:16:27Z. The update package is 1.6 GB. This is a delta (partial) update that requires 15.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 947917fff831bff239876a3506c5fda22886c3cf.zip.