It helps if you have a more descriptive topic, it'll help people see at a glance what your problem is.
Why exactly do you need the OpenGL SDK? I've never needed it. The necessary headers can be found here. Everything else will be found elsewhere. If you're on windows, you get the library files with your compiler, and you get the dll from your graphics card manufacturor driver. If you're on linux, you'll get both of those from the driver, normally. I'm not sure about the mac, myself.