audioOS 9.9.15.6 (build 19M65) is an official Apple over-the-air update for the HomePod, released on 2022-07-20T17:23:48Z. The update package is 235.99 MB. This is a delta (partial) update that requires 15.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4a7f959814d31c30d2165d525217a66219b444cf.zip.