So here we are, xhyve finally usable, so how to use it?
xhyve is a port of
bhyve a qemu equivalent for FreeBSD to the Mac OS X Hypervisor framework. This means it has zero dependencies that are not already installed on every Mac that runs at least OS X Yosemite (10.10). The cool thing though is that Mac OS X has full control of the system all the time as no third party kernel driver hijacks the CPU when a VM is running, so the full power management that OS X provides is always in charge of everything. No more battery draining VMs \o/.