I have been using
Russ Cox's 9vx on OS/X Mavericks with considerable success. The only issue being that I need to connect a Logitech 3 button mouse via a Unifying RF dongle (BlueTooth mice don't work for me).
Although 9vx is somewhat minimal, I download sources as I require them from
9p.io website.
Personally I find the 9vx environment more to my liking as I can edit code with vim, use Finder, etc using OS/X concurrently with Plan9 -- yes, I know that is heretical to die-hard Plan9 folks, but I'm a *nix guy foremost and a Plan9 newbie.
Pardon the confusion over which model RPi I am using. I have several from different releases and I get confused as to which one I am using at any given time. Swapping SDHC cards, etc