I have a 2013 15inch retina MacBook Pro and two Dell U2414H as external monitors. I want to watch video or play games like the image in this question. For the current mac system, I can only achieve two individual external monitors not like the dual monitors. I tried to install Windows 7 on my MacBook Pro, and it can become the dual monitors. However, when I tried to play some video, it can only be displayed on one monitors. Can anyone help me with the issue?