I shouldn't have any other versions of Xcode installed. I installed Xcode after doing an Erase Content and Settings on the computer.

Also is there a way to get rid of the console output for the Class warnings? It makes it hard to read the actual output from the playground.

I'm literally just doing a Hello World print statement, it takes several minutes to show anything. I had to turn off the 'Automatically run' option because it would sit there seemingly doing nothing.