IMPORTANT NOTICE (updated June 2nd 2011) A stackoverflow user named “Psychonetics” has left a comment that the compiled intl extension does not work properly. I have yet the time to verify it. If you have an intel-based mac, you can try Psychonetics’s solution, which is to install and use Zend Server CE instead. If you still prefer MAMP, he suggested to extract the intl.so from Zend Server CE, whi