[Rails] An error occurred while installing rmagick.

Problem

An error occurred while installing rmagick (2.13.2), and Bundler cannot continue. Make sure that `gem install rmagick -v '2.13.2'` succeeds before bundling.

Solution

brew install ImageMagick gem install rmagick

Problem

An error occurred while installing rmagick (2.13.2), and Bundler cannot continue.
Make sure that `gem install rmagick -v ‘2.13.2’` succeeds before bundling.