Some people need to run macOS-only software, this potentially makes it a bit less painful than the alternatives for the same reason containerized versions of other finicky setups do.
In the README there's a blurb with:
> Run Mac OS X in Docker with near-native performance! X11 Forwarding! iMessage security research! iPhone USB working! macOS in a Docker container!
> Conduct Security Research on macOS using both Linux & Windows!
I can imagine this being useful for CI builds, for instance. On the other hand, this is probably against Apple’s license agreement, so businesses would want to stay away from it.
In the README there's a blurb with:
> Run Mac OS X in Docker with near-native performance! X11 Forwarding! iMessage security research! iPhone USB working! macOS in a Docker container!
> Conduct Security Research on macOS using both Linux & Windows!