well if you play in the terminal and not in the IDE then if you type csh in terminal, then you have a c-shell... with its .cshrc file...
if you want this permanently, just open the preferences of the Terminal Application
and choose your favorite one in the textfield - all those shells ship standard...
/bin/csh
/bin/zsh
/bin/ksh
/bin/tcsh
/bin/bash
/bin/sh