audioOS 9.9.14.2.1 (build 18K75) is an official Apple over-the-air update for the HomePod, released on 2020-12-07T18:12:41Z. The update package is 241.23 MB. This is a delta (partial) update that requires 14.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2f3cb0643e92808c11e908c5b07eda7227795fb2.zip.