For those who would like to use bhyve for OS X, a BSD-licensed virtualizer has been ported. Check out xhyve below. 
xhyve is a lightweight virtualization solution for OS X that is capable of running Linux. It is a port of FreeBSD’s bhyve…
- super lightweight, only 230 KB in size
- completely standalone, no dependencies
- the only BSD-licensed virtualizer on OS X
- does not require a kernel extension (bhyve’s kernel code was ported to user mode code calling into Hypervisor.framework)
- multi-CPU support
- networking support
- can run off-the-shelf Linux distributions (and could be extended to run other operating systems)
See this weblog post for instructions on running Tiny Core Linux or Ubuntu Server with xhyve.
