Make sure you have ImageMagick set up:
On Mac:
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
brew install imagemagick
Make sure you have ImageMagick set up:
On Mac:
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
brew install imagemagick