CudaMiner for OS X has been updated to run without requiring Xcode, MacPorts, and other setup steps. 

For binaries and instructions see http://www.johnchapman.net/cudaminer/

Prerequisites

• Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, or OS X 10.9 Mavericks
• Compute 2.x or Higher NVIDIA GPU (Compute 1.x GPUs are not supported), see https://developer.nvidia.com/cuda-gpus for a listing of supported devices
• CUDA Toolkit and Drivers 5.5: https://developer.nvidia.com/cuda-downloads

CudaMiner for OS X previously required installing Xcode and MacPorts, in addition to a number of configuration steps.  These are no longer required.