Just spent slightly too long working this out so I thought I’d post this for those with similar requirements.
You need to follow the steps from http://tmtm.org/en/mysql/ruby/. Use ruby extconf.rb --with-mysql-config as the first command.
Adventures in Computer Programming – bakert@gmail.com
Does the mySQL Ruby Gem then point to mySQL in MAMP?
Or to the external mySQL that comes with OSX?
thanks!