Use this cable adapter to connect your Mac with a Mini-DVI video output to an external monitor, TV, projector or other display devices with HDMI input. Connect the Mini-DVI to your Mac, and connect the HDMI end to an HDMI cable, and then connect the cable to your HDMI input. NOTE: This device is intended to function as an adapter. It will need to be used with a HDMI cable (sold separately). This adapter ONLY works with Mini-DVI and NOT with Micro-DVI or Mini Display Ports. This adapter are only compatible with Apple computers purchased prior to October 2008, except for Mac Mini.