HomePods with beta version of iOS. As it has now become known, Apple delivers the HomePod with a beta firmware version. Developer Guilherme Rambo informs that on the supplied Smart Speakers from Apple software is installed, which may be technically referred to as pre-release. It was tried by company employees at the time.
The HomePod is running a customized version of iOS - at least for the moment
HomePod with Beta Firmware
In any case, the HomePod uses a version of iOS 11.2.5 with the build number 15D59, which according to Guilherme Rambo is one version which was only tested by employees of the company as part of the "Living on Beta" program that the company offers to its employees.
Accordingly, Rambo speculates that Apple will soon release a first update for the Smart Speaker. The device can be bought since today in Australia, Great Britain and the USA. In addition, pre-orders should receive their deliveries.