2012 iMac, Mavericks 2014 macbook Air, Yosemite I have an iMac work station with a secondary HP Dream Color monitor hooked up DVI-D or VGA. Wired Mouse, wired keyboard, headphones. I want to monitor my Air on that secondary monitor. I'd like to also work on my System A but monitor system B while I work. So this may be some type of independent switch? Not sure just starting to hash this out. Any ideas? Thanks in advanced.