If my second display is not showing up on the graphics display window, yet the second display is showing a mirror image, how can I get it to recognize the second display and allow me to setup extended desktop?
I'm running 10.9.2 on a Power Mac from 2013. I am using two identical HP monitors. I have a Y adapter to connect the monitors. Which I'm guessing means the computer is only seeing one display since there is only one display output.
Mac Pro, OS X Mavericks (10.9.2), graphics card is ATI Radeon HD,