So heres whats happening. I just got a new computer (2013 Macbook air) and want to bring over a project from a xcode 4 project, not that it really matters, because I'm still struggling with getting it to compile the SFML default starter project.
I'm thinking that it I may not be using the correct version of SFML - on my original project it was the GCC version and thats what I started with on the new machine, didn't work - so I went back re-read the tutorial again for installing, downloaded the 'clang' version, over wrote all Framework library files (replacing GCC with clang), made sure I have the updated template plist, installed Command Line Tools, and started a new SFML App project using C++11 with Clang and libc++. So (obviously) before I start porting over my code, I try to compile default project and I consistently get linker errors.
So I have then closed Xcode, deleted the project and tried with each C++ Compiler and standard library option, just to see. Each time it fails, I close Xcode, trash project and try the next. Still no luck