Several people have posted about how they use 3 external monitors with their MacBook Pro Retina. see:
However, when I attempt to do this on my 15" late 2013 MacBook Pro Retina, I can only run 2. Either, 2 thunderbolt, or 1 thunderbolt and 1 HDMI. When I plug in all 3, only 2 of them work.
Apple tech says
Yep. You can only have 2 external monitors (unless you want to add a usb monitor).
Is there some trick I am missing? Some setting to tweak? I have 3 monitors just waiting for the solution. One of my monitors feels quite left out...