Tripp Lite P137-06N-VGA video cable adapter Mini DisplayPort VGA (D-Sub) + 3.5mm White

Connect a VGA monitor to a Mac or PC with a Mini Displayport output
Compatible with Thunderbolt 1 and 2 ports on Mac computers
Plug-and-play convenience—no drivers or software needed
Supports computer video resolutions up to 1920 x 1200, and HD resolutions up to 1080p
Ideal for use with graphics cards, such as AMD Eyefinity, that do not output Dual Mode (DP++) signals
Converts both Single-Mode and Dual Mode (DP++) Displayport output