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There is some support for GLSL 3.3, 4.0 and 4.1 in OS X Mountain Lion; http://renderingpipeline.com/2012/11/first-hints-of-opengl-4...

GLSL 3.3 was present but hilariously broken in Lion, if you explicitly requested it in your shaders.

Hopefully things will improve for Mac OS X 10.9.

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Yeah I've seen those, but 2.1 comp or 3.2 core is what you can "count on officially" as of now. I'd rather have code branches just depending on GL_VERSION, and none ever depending on extensions... if extensions make it in the next core profile, they can make it into my code. Then, if that version shows up on OSX 5 years later, great for those Macster users, they're into retro stuff anyway ;)

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