Graphviz on OS X

tried running the Graphviz programs on OS X (sudo fink install graphviz) and got a font error message, ‘Could not find/open font : Times in…’

To use the Graphviz programs with OS X, need to specify

-Nfontname=luxisr

The program can use fonts in /usr/X11R6/lib/X11/fonts/TTF. This is part of
the Apple supplied X11 (part of the optional/developer OS install disk? I don’t recall when/how I installed it.).
Found this info at: link