Length: 23.5CM Simply, plug the Mini Display Port end into your Mac, and connect the HDMI end to an HDMI cable, then plug the cable into your HDMI input jack. Please Note: The Mini Display Port is only found on newer models of Macs. You should check what port type you have before purchase. Mini Display Ports dating before April 2010 do not support audio out and will not transmit sound. Helpful Notes: It will need to be used with an HDMI cable (sold separately). Apple Computers with Mini Display Port: MacBook, MacBook Pro, MacBook Air, and Mac Mini. Also, works with Mac computers that have Thunderbolt.