Optimize settings for mac mini?

Hello, I have a mac mini that’s my primary blender machine. It’s well stocked on memory and CPU but has a really wussy video card built in. Blender really gets fuzzy sometimes on the UI and lags badly when trying to redraw it. It renders really fast and otherwise works well, and if I minimize the Blender window so its smaller it works better. I’d love to take advantage of all the screen space on my display however.

Anyone have any tips to set blender’s prefs or settings to make it work better on a mini? FWIW it’s a new one intel core duo 2 G RAM.