Using Mac ports

sudo port install ImageMagick

If you have an existing ImageMagick installed, you will get this error:

Error: Target org.macports.activate returned: Image error: Another version of this port (ImageMagick @6.4.3-6_0+q16) is already active.

To remove the old version, try:

sudo port uninstall ImageMagick @6.4.3-6_0+q16
—> Deactivating ImageMagick @6.4.3-6_0+q16
—> Uninstalling ImageMagick @6.4.3-6_0+q16

USING IMAGEMAGICK WITH PAPERCLIP WITH PASSENGER:

set this in config/initializers/paperclip.rb

Paperclip.options[:image_magick_path] = ‘/opt/local/bin/’

By Jason