Cable Matters Gold Plated Mini DisplayPort (Thunderbolt™ Port Compatible) to DisplayPort Cable in White 6 Feet
Overview* Macs made before 2010 areNOTable to output audio over Mini DisplayPort.* Thunderbolt™ Port compatibleInstructionsPlease drag the window on the desktop all the way over to the display edge and the window will be displayed on the external display. You may set external display to a mirror display.1 With your external display connected to Mac, open System Preference2 Select Display3 Select Arrangement  tag4 Check Mirror DisplayTransmitting audio1 Open System Preference2 Select Sound3 Select Output tag4 Choose external source instead of built-in speakerSpecifications* Supports Display 1.1a* Supports resolution up to 2560x1600, including 1080p and 1920x1200* Supports 36-bits of color depth with a 120 Hz video refresh rate* Data transfer rates of up to 10.2 GB/second* HDCP compliant* Connector: gold plated male Mini DisplayPort/Thunderbolt™ Port & male DisplayPortCompatibility(List is not complete)* MacBook* MacBook Pro* MacBook Pro with Retina Display* MacBook Air* iMac* Mac Mini* Mac ProLenovo ThinkPad* X1 Carbon* X230* L430/530* T430s/430/530* W530Microsoft Surface for Windows 8 Pro (DoesNOTwork with Surface for Windows RT)HP Envy 14/17Dell XPS 14/15/17Google Chromebook PixelThunderbolt is a trademark of Intel Corporation in the U.S. and/or other countries.