:-)

 

There is a brief tutorial here; http://chuck.cs.princeton.edu/doc/build/
It comes down to copying the chuck executable to a location that is in your terminal's "path", which means that you will be able to use it like any other command there.

It's a bit hard to know how to explain this to you when I don't know how familiar you are with the terminal. Did you use it before? If not it might make sense to look up a short tutorial about the OSX terminal and then go read that link. With a brief tutorial on topics like navigating directories and copying files you should be just fine, knowing a bit about the terminal will be helpful to you in everyday life anyway, so that's not lost time.

Yours,
Kas.