I'd like to buy an anker usb hub, but they only sell usb 3.0 ports. My problem is that my iMac only has usb 2.0 ports. Does anybody know if a 3.0 hub can be plugged into a usb 2.0 port. I expect that it won't run at the usb 3.0 speeds, but if it does, it would be nice to know.