The simplest way I’ve found to install Midnight Commander in Mac OS Lion is to use rudix package.
Rudix is a collection of Unix software packages for OS X Lion (plus Snow Leopard).

Mc screenshot 300x166 Simple way to install Midnight Commander in Mac OS Lion

http://code.google.com/p/rudix/

If you need step by step instruction go inside

1. Install rudix, just open terminal and type:
curl -O http://rudix.googlecode.com/hg/Ports/rudix/rudix.py

sudo python rudix.py install rudix

2. Install mc using rudix, type in terminal:
sudo rudix install mc

3. Now you can run it by typing
sudo mc