Some question of my friends , how to set up facebook video calling in Macintosh , it is simple as you install in windows platform, pointing your url to www.facebook.com/videocalling , then click set up, and you will get link download Facebook Video Calling.jar , it is jar application to install video and audio driver for your Mac OS, then just wait for few minutes, depend on your internet connection, and tara, you can start video call on facebook.
facebookVideCalling.jar