Hi, I made a post about this in the wrong section I believe, sorry for double post. Setup: Macbook Air 2015 with Thunderbolt 2 Connection on OS X 10.10.4 Akitio Thunder2 Nvidia 750 Ti sc (One Fan) Dell DA-2 Cable: Akitio Egpu 8 Pin to 2 x PCI E 6 Pin Super Low Profile No Latch 1 x Barrel | eBay The Akitio is powered by only the barrel plug The Monitor is plugged into the GPU. The set-up is working, and the card is recognized, but my FPS in games is about the same as my HD6000 I used the Script provided by Goalque: Mac OS X discussion The card uses about 75 watts, but a few people have reported the stock PSU is powerful enough to get the card started, but not if it gets under load. I'm not sure if plugging in the Dell DA-2 is any different than the PSU included with the Akitio since I'm just plugging in the barrel plug. Do I need a powered riser? Also, when I look at the Nvidia web driver, it says the 750 Ti isn't supported even though its recognized. Is this just a problem with drivers? I don't know what to do!