I would really recommend giving R another chance. But I'm a statistician, and I don't know what you are or what you're trying to do...
If you need a GUI, then I recommend JMP. But like most proprietary statistical packages, it's rather expensive. There is a Mac version, so no need to run Windows. (No idea why SAS has a native Mac version of JMP but not SAS. GAH. Really hoping for SAS to come back to the Mac one of these days...)