System requirements

You’ll need modern Ruby (>=2.4) with Bundler, Git, ImageMagick, and GhostScript. You can check your versions with the steps below, or follow a full Installation guide.

Check for Ruby:

$ ruby -v
  ruby 2.4.2p198 (2017-09-14 revision 59899) [x86_64-darwin15]

Check for Bundler:

$ bundler -v
  Bundler version 1.16.1

Check for Git:

$ git --version
  git version 2.19.0

To process images, you will also need to have ImageMagick and Ghostscript installed and functional.

Check ImageMagick:

$ convert -version
  Version: ImageMagick 6.9.9-20 Q16 x86_64 2017-10-15 http://www.imagemagick.org
  Copyright: (c) 1999-2017 ImageMagick Studio LLC

Check Ghostscript:

$ gs -version
  GPL Ghostscript 9.21 (2017-03-16)
  Copyright (c) 2017 Artifex Software, Inc.  All rights reserved.

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