I'm programming for mac os x. And made simple paint program. On my mac its working good but on older mac (macbook 2.1 (Intel GMA 950) and macbook 3.1 (Intel GMA x3100)) opengl part of my app is not working at all. It shows white window at were it should be my painting field (fully opengl).

On my mac it looks like this:
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And on older macs it looks like this:
Click image for larger version. 

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