multiple screens

I want to activate the graphics card on the mac side for 6 screens(works on the window side fine) How do I do it?

Hi, Motherboard: Gigabyte GA-Z87X-SLI (http://www.gigabyte.com.au/products/product-page.aspx?pid=4778#ov ) which I'm reliably informed is the same spec as the http://www.gigabyte.com.au/products/product-page.aspx?pid=4764#ov Graphics: Nvidia / GeForce 9600GT & Intel built-in GPU (System...

Hello. I'm using a notebook with Yosemite and want to use two external displays at home. To my sorry the notebook has just one HDMI output which I guess is very common. It also provides 3 USB 3.0 Ports and so I'm looking forward to buy an external graphic card. I couldn't find a lot of...