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.
Not that i'm aware of, but using the hypervisor is pretty much the entire point. If you need to use vbox etc then just use docker-machine
Apologies for hijacking this comment, but I've been unable to find the beta bug report email/form. Do you happen to have that handy?