After a long search for the right ExpressCard USB 3.0 for my MacBookPro 17, I decided for a price for this. Also, I was able to read some of User on the Internet that they were able to install the card successfully. The Plus: Fits housing conclusively in the Book favorable price compared to other Minus: Once the interface is connected to a cable, one must be careful that does not come out the same card, if you inadvertently left connected to the cable. The catch is not particularly good. Whether it is the Book or Card I can not say. Well the driver of this company helps Mac not - because you still have quite a few commands write to the terminal. The data throughput is with me about 60-70 MB / s