How to select the Python.3 interpreter in Eclipse on a Mac

This foxed me for a bit.
I have Pydev installed, and Python 2.n and all is well. But I needed Python 3.3

Install 3.3

So go to Python: http://www.python.org/download/ and download the installer.

Then install as usual on a Mac.

Now check that it's in place.
There should be a folder in Applications/Python 3.3

There should also
Macintosh HD - Library/Frameworks/Python.framework/Versions/3.3

Select the interpreter.

So now, select the interpreter in Pydev.

1. You go to Eclipse > Preferences > PyDev > Interpreter - Python
2. From here you, Select New, 
3. in Interpreter Name you enter python3 and in Interpreter Executable you enter /usr/local/bin/python3 or /usr/local/Cellar/python3/3.3.0/Frameworks/Python.framework/Versions/3.3/bin/python3.3.
4.  OK