Example of cross-platform Guard support gems

Gemfile

group :tools do
  gem "guard"
  gem "guard-bundler"
  gem "guard-rspec"

  #For detecting changes in the filesystem
  gem 'rb-inotify', :require => false
  gem 'rb-fsevent', :require => false

  #For displaying notices
  gem 'growl', :require => false
  gem 'libnotify', :require => false
  gem 'terminal-notifier-guard', :require => false
end