Please open follows files, both run same Mac, Rhino Mac and Rhino windows( run in Parallels or bootcamp), and try to rotate the mold in Perspective view, you can feel Rhino Windows more faster than Rhino Mac.
No, this is not low resolution. This is full Retina resolution of your MacBook Pro. Please see
this wiki article for the meaning of the screen resolution field in the System Preferences panel.
This is not retina resolution. There are several things here that don’t make sense. The actual resolution of your display is 2880 x 1800 pixels. Apple presents this in System Preferences as 1440 x 900 (points). It is not possible to set your display to 2560 x 2600 points with any software that Apple provides. In fact it should never be possible to use this setting with any software, because this would make your virtual screen height larger than the virtual screen width, and that does not make sense.
Let’s assume you really meant 2560 x 1600. This still is not an option in System Preferences - the largest value available in System Preferences is 1920 x 1200. Did you really mean 2560 x 1600? If so, how did you do that?
Comparing performance with Windows running in Parallels is not a valid comparison. The OpenGL driver in Parallels is inadequate for Rhino, and Rhino turns off a lot of its advanced OpenGL drawing features when it sees a deficient OpenGL driver.
If you want to compare with Rhino for Windows, you would need to boot into Windows and run Rhino there for a valid comparison.