I followed the installation of RMagick for OSX: http://rmagick.rubyforge.org/install-faq.html#osx
I have done the
Another think to watch out is the version of imagemagick. I had ImageMagick version 6.8.0, which is the latest if you install from homebrew, and rmagick just does not compile with this version. So do a
convert --version
and make sure that your ImageMagick is 6.7 or less otherwise rmagick wont compile..