I'd like to add USB 3 to my wife's 2011 17" Macbook Pro. She is running Lion 10.7.5 right now and I'm wondering if any USB 3 express card will work. Ideally I'd like to get one that is slim enough to fit right inside the card so it does not stick out like others. From what I have read online I have heard of the following issues. 1.) No power of the express port. True or not? This would suck for portable hard drives and mean its useless for my wife. 2.) No real Mac solution for drivers for the slim express card usb3 models Any help would be greatly appreciated!