I am surprised it uses macOS as the demo, as I thought it would be harder to control vs Ubuntu. But maybe at the same time, macOS is the most predictable/reliab

I am surprised it uses macOS as the demo, as I thought it would be harder to control vs Ubuntu. But maybe at the same time, macOS is the most predictable/reliable desktop environment? I noticed that they use virtual environment for the demo, curious how do they build that along with docker, is that leveraging the latest virtualization framework from Apple?