I believe you'll want this: http://xquartz.macosforge.org/landing/ http://xquartz.macosforge.org/landing/ There may also be homebrew packages for the X11 heade

I believe you'll want this: http://xquartz.macosforge.org/landing/ http://xquartz.macosforge.org/landing/ There may also be homebrew packages for the X11 headers/libs, but I believe XQuartz is the current popular way to do it.