The Cable Matters Active Mini DisplayPort to HDMI Adapter is an indispensable companion for your Mac, PC, or tablet equipped with Mini DisplayPort. Connect your laptop or tablet to an HDTV for ultra-high-definition video (4K @ 60Hz) and audio streaming or to a 4K monitor or projector with this portable adapter and an HDMI cable (sold separately).
Link: https://www.amazon.com/Cable-Matters-DisplayPort-Supporting-Technology/dp/B00PJ3LSIG