MINI DP to HDMI, aLLreLi 6ft Mini DisplayPort DP (Thunderbolt Compatible) to HDMI HDTV Cable for iMac, MacBook Pro, Macbook Air and PC - White This converter can only pass signal from Mini DisplayPort to HDMI port(Also Support new thunderBolt Port). It is not a bi-directional cable IMPORTANT NOTE: Mini DisplayPort is NOT compatible with Macs (before 2008) that have Mini-DVI. Please check your port before purchase! Suitable for MacBook, MacBook Pro, MacBook Air or devices utilizing mini Displayport Support HDMI HD solution up to 1920*1080P. Support Audio output.(Macs made before 2010 are NOT able to output audio over Mini DisplayPort.) <span class="a-text-bold">Mac</span>:Apple MacBooks, MacBook Air, MacBook Pro, MacBook Miniand iMac made from 2010 onward that have Mini Display ports <span class="a-text-bold">PC</span>:Microsoft Surface for Windows 8 Pro, Surface Laptop, Surface Studio;<br> Lenovo ThinkPad X230, L430/530, T430s/430/530 &amp; W530, HP Envy 14/17, Dell XPS 14/15/17, Google Chromebook Pixel, etc With your TV connected to Mac, open System Preference Select Display Select Arrangement tag Check Mirror Display Open System Preference Select Sound Select Output tag Choose external HDMI instead of built-in speaker