I'm pretty sure the screen will work as an extra display without drivers but the pen is dependent on drivers. If the screen is working but not the pen then that might be the issue. A good start would probably be downloading the latest drivers from the Wacom website.
MalbenthomasFeatured By OwnerJan 11, 2013Student Filmographer
I tried that about ten times, I even restarted the computer. For some reason, every time I go to system preferences the tablet menu states that " A supported tablet was not found on the system". I think the tablet itself may have a defect.