Why is the native 1900 by 1200 missing? How can I set that resolution? I tried but messed up the display. It went black and I had to restart. I before used one of thes other apps that don't have so many prefs. But somehow the one I use does not work very well. Sometimes switching between resolutions gives me a messed up screen with green fragments and I can not set back to best for retina. I think the program did something deep in the system... When restarting the MacBook the apple logo is uge. Does anyone know how to get this fixed and get the system back to the state before installing that programm. Sorry forgot the name... something like RDM?!?!?!