Ruby on Rails无法使用MySQL创建/使用应用程序

I'm trying to learn Rails but I can't create a project using MySQL. I use MAMP for developing with PHP on OS X 10.9 so I'm trying to configure my Rails to run with it but I can't. If someone have some tutorial or clue what is happen here I'll be very thankful.I'm trying to learn Rails but I can't create a