title: rmagick gem install "Can't find Magick-config"
body: <p>I get the error shown below when attempting to install the rmagick gem. I am on Snowleopard 10.6 using RVM, Ruby 1.9.2-head and Rails 3.05. Responses to similar questions recommended installing ImageMagick, which I successfully did. Other suggested installing the &quot;libmagick9-dev library&quot;, however, I can not figure out how to do this.</p>
  <p>I'm a new developer, and any assistance or directions to an existing explanation or resource is greatly appreciated. Thanks!</p>
  <pre><code>jjdevenuta(opal)$ gem install rmagick
  Fetching: rmagick-2.13.1.gem (100%)
  Building native extensions.  This could take a while...
  ERROR:  Error installing rmagick:
  ERROR: Failed to build gem native extension.
  
  /Users/jjdevenuta/.rvm/rubies/ruby-1.9.2-head/bin/ruby extconf.rb
  checking for Ruby version &gt;= 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 /Users/jjdevenuta/.rvm/gems/ruby-1.9.2-head@rails3/bin:/Users/jjdevenuta/.rvm/gems/ruby-1.9.2-head@global/bin:/Users/jjdevenuta/.rvm/rubies/ruby-1.9.2-head/bin:/Users/jjdevenuta/.rvm/bin:/usr/local/bin:/usr/local/sbin:/usr/local/mysql/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/git/bin:/usr/X11/bin
  
  *** 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/jjdevenuta/.rvm/rubies/ruby-1.9.2-head/bin/ruby
  </code></pre>
  <p><strong>UPDATE</strong>
  If you're a Mac/OS X user I would HIGHLY recommend using Homebrew as your package installer/manager. You can find it <a href="https://brew.sh/" rel="nofollow noreferrer">HERE</a>. Since originally asking this question I have removed all my prior installs of things like rmagick and imagemagick, and reinstalled them using Homebrew. Super easy with a huge catalog of packages, and updates/uninstalls are a cinch as well!</p>