x11 forwarding.

http://developer.apple.com/opensource/tools/runningx11.html

http://www.microbiol.unimelb.edu.au/people/dyallsmith/ARB_OSX/ARB_to_MacOSX.html

http://www.sinomac.com/modules/newbb/viewtopic.php?topic_id=7061&forum=13&post_id=32481

http://forums.macnn.com/archive/index.php/t-18760.html