Mini display port the adapter seamlessly connect mac book, mac book pro, or mac book air with a mini display port to high definition displays. Support hdmi, dvi or vga input port you can connect the display to one of hdmi/dvi/vga output ports. Support audio output, when connecting the iMac (late 2009) and mac book pro (mid 2010) to hdmi display. Only one of the 3 outputs could be used at a time, you cannot use all of them simultaneously.