Mac Trackballs & Accessories
Mac Trackballs
Most usb and bluetooth trackballs will work with a Mac. I have used the MarbleMouse trackball for years. Its optical technology makes it move smoothly and it works for both left and right-handed people. Note that it doesn't have a scroll wheel. Instead it just has two little buttons which can be configured for scrolling but only if you install the driver.
Some trackballs have drivers written specifically for Mac OS X. That said, they are usually less powerful than their Windows counterparts and often even buggy. Most trackballs will work without a driver, using just the built-in Apple mouse driver which supports left and right buttons as well as many scroll wheels.
My son, who has always used a trackball, asked me recently, "Why do people use a mouse?". I had to answer, "I don't know".

