You should try it. The toolbar is just there to see the status of the daemon and adjust vm settings. You still use the cli to use docker just like on linux.
Yea, the GUI is just there to manage updates and to let you know it's up and running, you use the actual docker CLI commands for everything just like on Linux. The hypervisor is completely abstracted away. For example, here's the output of me running `docker info`:
Kernel Version: 4.4.13-moby
Operating System: Alpine Linux v3.4
OSType: linux
Architecture: x86_64
CPUs: 2
Total Memory: 1.954 GiB
Can it fall back to Virtualbox/vmware/parallels/etc if Hypervisor.framework isn't available? Hypervisor.framework doesn't run on somewhat dated x86 machines.