I run the usb 2 on both mac and pc and it is very smooth. If you don’t know much about routing signals beware that this product is made for pros who understand the simple routing of the studio but don’t worry it could be a great learning tools if you have no experience. Pre amps are out of this world and the fx plug-ins sounding incredible. Reading negative comments on the net was kind of putting me down but I made my decision and well happy with it. I recorded a band on the second day of receiving this and it sounds expensive! Best thing happened to my studio!