It is exactly double the resolution the laptop would normally have (-> 2880 x 1800) without content on the display getting smaller (resulting in UI elements getting scaled up to double resolution) Yes, this is on an rMBP. OSX does not take over the scaling (only if told so, which works for programs like MS word, but not for programs with 3D content in my experience), programs are run in normal resolution (i.e. 1440x900) so they look very bad compared to everything else on the display however this is different for games: most games detect 1440x900 as native resolution, so this is the maximum setting. there are games which are aware of the full 2880 x 1400 resolution and have that setting available. the problem is (and I have no idea how to fix this) that KSP (or Unity) does not use the resolution, if KSP is run in windowed mode and resolution is edited to 2880x1800, the window has twice the size of the actual display, when now toggled to fullscreen, it goes back to 1440x900..