I've been struggling with getting anything above OpenGL 2.1 working with OpenTK on my Mac using OS X 10.9. I know it is supported on my hardware. Browsing through the source on Github, I followed the major and minor version constructor parameters from GameWindow to GraphicsContext to MacOSFactory where they are completely ignored. Eventually I found a thread in the forums which implies that OpenGL 3+ with OpenTK will not work on a Mac (http://www.opentk.com/node/3171).
Is this still the case with the new SDL2 backend in OpenTK 1.1 beta1? If not, how can I switch my project to use the new SDL2 backend? I tried copying both SDL2.dll and libSDL2.dylib from the Dependencies folder to /Library/Frameworks. I also tried the SDL2.framework from the DMG on libsdl.org. Am I missing something?