audioOS 11.4 (build 15F80) is an official Apple over-the-air update for the HomePod, released on 2018-05-29T17:08:02Z. The update package is 2.28 GB. This is a delta (partial) update that requires 11.2.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1804fbf5dd90c47be481e87058b252f9af60b850.zip.