Eu usei um script para instalar o ImageMagickhttp: //github.com/masterkain/ImageMagick-s

epois de um tempo, instalei o ImageMagic

Então eu corri sudo gem instalar rmagick e tenho

Building native extensions.  This could take a while...
ERROR:  Error installing rmagick:
ERROR: Failed to build gem native extension.

.rvm/rubies/ruby-1.9.2-p0/bin/ruby extconf.rb
checking for Ruby version >= 1.8.5... yes
checking for gcc... yes
checking for Magick-config... no
Can't install RMagick 2.13.1. Can't find Magick-config in...

Estou trabalhando no OSX Snow Leopard com Ruby 1.9.2 e Rails 3. Alguma idéi