MacPorts and Porticus are both fine pieces of software. Used in combination with MacPorts, Porticus acts as a front-end to MacPorts.

“The MacPorts Project is an open-source community initiative to design an easy-to-use system for compiling, installing, and upgrading either command-line, X11 or Aqua based open-source software on the Mac OS X operating system. To that end we provide the command-line driven MacPorts software package under a BSD License, and through it easy access to thousands of ports that greatly simplify the task of compiling and installing open-source software on your Mac.”… http://www.macports.org/

I spend a great deal of time using Ubuntu, but there are often circumstances when i need to open a terminal and bash away using some command line apps.

Here’s an example of how i converted a mdf file to iso using mdf2iso which is available via MacPorts.

MDF2ISO is a very simple utility to convert an Alcohol 120% bin image to the standard ISO-9660 format

1. Install MacPorts http://www.macports.org/install.php
2. Install Porticus http://porticus.alittledrop.com/
3. Open terminal and use the following command: /opt/local/bin/mdf2iso /TARGET-PATH/FILE.mdf /DESTINATION-PATH/file.iso