Frustration point with Blender...help

Ok I hope I am just having a stupid attack (I realize how I am opening myself up here). Can anyone give me even a nudge in the right direction? I have been trying to get Blender to run on my Mac Pro with the Nvidia 7300 card and I am having what looks like a driver problem after many searches, is there any thing I can do? All the material I can find seems to be too old or for windows machines. I have made posts to several fourms including the blender community I can't believe I am the only one with this problem? Thanks for any help, really any ideas would help. (The problem is the display does not show properly when the pointer passes over the menu area and buttons don't seem to refresh properly.)