I'm using my 28" Widescreen television as a secondary display sometimes to watch movies from my iMac. It works great. But to disable it being used as a secondary display I have to plug out the mini-dvi cable from my iMac. Isn't there a simpler solution to this? My Windows PC has some sort of software from ATi that has profiles for things like this. Like "Tv connected" (uses the TV as primary display to play video feeds on) and "Tv not connected" (uses only the computers own screen). Is there anything like this available for OS X?