Fix for RMagick 2.12.2 vs. ImageMagick. Mac, Homebrew

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

This will also help you.
brew remove imagemagic
brew tap homebrew/versions
brew search imagemagic
brew install homebrew/versions/imagemagick-ruby186
gem install rmagick -v '2.12.2'