You misunderstood him. He's not saying "only cocoa exposes gl", he said "cocoa only (as in just) exposes GL, but other cross-platform libs also expose it for yo

You misunderstood him. He's not saying "only cocoa exposes gl", he said "cocoa only (as in just) exposes GL, but other cross-platform libs also expose it for you if you prefer not to deal with cocoa".