update to 10.6.6 : http://support.apple.com/downloads/#macosx106
xcode : 애플홈피에서.
macport : http://guide.macports.org/
curl : 깔려 있었음
x11: 깔려 있었음.
git
mysql : sudo port install mysql5 +server
http://2tbsp.com/content/install_and_configure_mysql_5_macports
rvm