# File lib/guard/notifiers/growl_notify.rb, line 38
      def available?(silent = false, options = {})
        if RbConfig::CONFIG['host_os'] =~ /darwin/
          require 'growl_notify'

          begin
            if ::GrowlNotify.application_name != 'Guard'
              ::GrowlNotify.config do |c|
                c.notifications         = %w(success pending failed notify)
                c.default_notifications = 'notify'
                c.application_name      = 'Guard'
              end
            end

            true

          rescue ::GrowlNotify::GrowlNotFound
            ::Guard::UI.error 'Please install Growl from http://growl.info' unless silent
            false
          end

        else
          ::Guard::UI.error 'The :growl_notify notifier runs only on Mac OS X.' unless silent
          false
        end

      rescue LoadError, NameError
        ::Guard::UI.error "Please add \"gem 'growl_notify'\" to your Gemfile and run Guard with \"bundle exec\"." unless silent
        false
      end