Hi 755scrabblematt,
Can you try this, launch the Adobe Application Manager from either the Start Menu or the Applications folder and install all updates. Then launch Photoshop CS6 and click the "License This Software" button and sign in with your Adobe Id. See if that resolves the issue.
For the 3D thing, this document might help or provide additional info.
http://helpx.adobe.com/photoshop/kb/512-vram-required-131.html
-Dave