For those of you that own the  21” Cintiq or Intuos 3 tablets and are running OS X 10.11 (El Capitan) - do not install the current posted driver 6.3.16-12.  You will not be able to use your tablets.  Please down grade your driver to 6.3.15-3 which can be downloaded via the below link.

 

-        http://cdn.wacom.com/u/productsupport/drivers/mac/professional/WacomTablet_6.3.15-3.dmg

 

 

The 6.3.15-3 driver supports OS X 10.11 (El Capitan), but it may not work on future releases of Mac OS.