The 85 Watt Power Adapter features a magnetic DC connector that ensures your power cable will disconnect if it experiences undue strain and helps prevent fraying or weakening of the cables over time. In addition, the magnetic DC helps guide the plug into the system for a quick and secure connection.<br> <b>Fits 15inch Mac Model:</b><br> A1398</b><br> <b>Compatible with Mac PRO 15 OR 17 inch: </b><br> Mac Pro (Retina, 15-inch, Mid 2015) MJLU2、MJLT2</b> Mac Pro (Retina, 15-inch, Mid-2014) MGXC2、MGXA2</b> MacPro (Retina, 15-inch, Late-2013) ME293、ME294</b> Mac Pro (Retina, 15-inch, Early-2013) ME664、ME665</b> Mac Pro (Retina, 15-inch, Mid-2012) MC975、MC976</b> <b>Fits 13inch Mac Model: </b><br> A1425、A1502、A1435、A1465</b><br> <b>Compatible with Mac PRO 13 inch: </b><br> Mac Pro (Retina, 13-inch, Early 2015) MF839、MF840、MF841、MF843</b> Mac Pro (Retina, 13-inch, Mid 2014) MGX72、MGX82、MGX92</b> Mac Pro (Retina, 13-inch, Late 2013) ME864、ME865、ME866</b> Mac Pro (Retina, 13-inch, Early 2013) MD212、ME662</b> Mac Pro (Retina, 13-inch, Late 2012)MD212、MD213r></b>