I\'m trying to figure out how to get rmagick on my app, and then make it work on Heroku?
I know this post is quite old but I just ran into this myself.
gem 'rmagick', '2.16.0', :require => 'rmagick'
Worked for me. According to my Heroku logs RMagick is deprecated in favor of rmagick (all lower case).
RMagick
rmagick
Hope this helps the future Googler.