Error

Can't install RMagick 2.12.2. Can't find the ImageMagick library or one of the dependent libraries. Check the mkmf.log file for more detailed information.

*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Provided configuration options:
  --with-opt-dir
	--without-opt-dir
	--with-opt-include
	--without-opt-include=${opt-dir}/include
	--with-opt-lib
	--without-opt-lib=${opt-dir}/lib
	--with-make-prog
	--without-make-prog
	--srcdir=.
	--curdir
	--ruby=/Users/mailo/.rvm/rubies/ree-1.8.7-2012.02/bin/ruby
	--with-MagickCorelib
	--without-MagickCorelib
	--with-Magicklib
	--without-Magicklib


Gem files will remain installed in /Users/mailo/.rvm/gems/ree-1.8.7-2012.02@alaplaya/gems/rmagick-2.12.2 for inspection.
Results logged to /Users/mailo/.rvm/gems/ree-1.8.7-2012.02@alaplaya/gems/rmagick-2.12.2/ext/RMagick/gem_make.out
An error occurred while installing rmagick (2.12.2), and Bundler cannot continue.
Make sure that `gem install rmagick -v '2.12.2'` succeeds before bundling.

fix

$ cd /usr/local/Cellar/imagemagick/6.8.0-10/lib
$ ln -s libMagick++-Q16.7.dylib   libMagick++.dylib
$ ln -s libMagickCore-Q16.7.dylib libMagickCore.dylib
$ ln -s libMagickWand-Q16.7.dylib libMagickWand.dylib