Using switchresX, os X can display resolutions bigger than 1080p through HDMI and DVI cables. If one have osx El Capitan, must first desactivate SIP ein order to create the custom resolutiom file. http://www.madrau.com/support/support/srx_1011.html Settings from http://surajms.com/2015/04/fixing-switchresx-saving-issue/