This tutorial by user tanb shows us how to get a FreeBSD virtual machine setup on xhyve. xhyve, a port of bhyve, is a virtualization platform for Mac OS X operating system. See the link below for the full instructions.

TL;DR

• Create 5GB FreeBSD image.
• Install FreeBSD on xhyve.
• Mount host directory.

Requisites

• OSX
• Homebrew
• xhyve

$ brew install xhyve --HEAD

Create Guest Image …

Full tutorial: https://gist.github.com/tanb/f8fefa22332edc7a641d