GL not working on Mac OS


For some reason, the GL class is not working on my Macbook Pro. For example, this site is showing a blank screen:

Any ideas what might cause this?

Edit: I have Unity Pro and nothing I do with the GL is working... the thing is none of the examples I find online work either which leads me to believe I have some open GL issues with my mac? If the webplayer isn't working something must be up.

On that page, I get a white screen with web player, and you can draw on it, and it's about the laggiest game I've ever played... and it's just drawing, and all the lines are just straight, no curves...

And as Jessy said, you need Unity Pro. And if you have Unity Pro, how's it not working? Show scripts/what not.