All Macs have had right click since the late 90's.

And for the last 3 years all desktop Macs ship with a multibutton button mouse. The Macbooks have something Windows laptops all need to adopt: multitouch.

One finger on the trackpad moves the mouse, two fingers scroll the window in any direction your desire. Hold two fingers on the track pad and tap with your thumb gives your a right click context menu that is useful for both lefties and righties.