Programming OpenGL on macOS

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AGL/Carbon

AGL is the old Carbon-based API with C bindings. The Carbon part needed for windowing and event handling are not thread-safe. There is no 64 bit version of this API.

Cocoa/NSGL

Cocoa is the modern API with Objective-C bindings. Mac OS X 10.5 Leopard and later ships 64 bit versions of Cocoa. Using OpenGL in Cocoa requires you to include the frameworks "Cocoa" and "OpenGL" in your project.

OpenGL versions

For a long time, MacOS X supported OpenGL only in version 3.2 and below. MacOS X 10.9, "Mavericks", added support for OpenGL 3.3, 4.0 and 4.1.