MoP Beta Mac - Can't set External Monitor to Max Res

Thought id give the MoP Beta another go since buying a new Mid 2012 MacBook Pro.

I game on a larger monitor but cant take advantage of the higher resolution of the monitor as it is not available in the options.

Normla WoW is fine however.

Anyone know of a fix? Cant edit the config file to manually set the rez either. If im using the laptops screen without the external connected its fine but it only sees my external monitor as a 1280x1024 4:3 monitor...

This is annoying to say the least. WoW is looking less and less appealing at the moment with how Guild Wars 2 is shaping up with the stress tests...

 
FAIL (the browser should render some flash content, not this).

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