as i had to reinstall my mac book pro after my harddisk has died recently, i post my list of essential packages i need for my developments in Mac OS X. I use Darwin Ports for this of course 
1 2 3 4 5 | sudo port install coreutils +with_default_names sudo port install python24 sudo port install py-celementtree py-checker py-docutils py-eyed3py-feedparser py-geoip py-libxml2 py-mx py-pil py-py2app py-readline py-reverend py-setuptools py-twisted py-unit py-wxpython sudo port install subversion sudo port install nmap tor |