The JDA159 adapter allows you to quickly and easily connect your Mac or Pc to a 4K Hdtv or other display device using an Hdmi input. First connect the JDA159 to your computer. Then plug your existing Hdmi cable from your display into the mini DisplayPort adapter. Compatible with both DisplayPort 1.2 and Thunderbolt 2, our JDA159 quickly converts the DisplayPort video signal into an Hdmi signal, and with its plug-and-play technology there is no need to download any drivers.