问无法运行growl通知和gem growl_notify引发错误

EN

gem 'rails', '3.1.3'


gem 'sqlite3'


group :development, :test do
  gem 'rspec-rails'
  gem 'capybara', :git => 'git://github.com/jnicklas/capybara.git'
  gem 'launchy'
  gem 'database_cleaner'
  gem 'rb-fsevent', :require => false if RUBY_PLATFORM =~ /darwin/i
  gem 'guard-rspec'
  gem 'guard-livereload'
end

gem 'growl'

group :test do
gem 'guard-spork'
end

JP:guard2 jayparteek$ guard
/Users/jayparteek/.rvm/gems/ruby-1.9.2-head@guard2/gems/rb-appscript-0.6.1/lib/appscript.rb:542:in `_send_command': CommandError (Appscript::CommandError)
        OSERROR: -10000
        MESSAGE: Apple event handler failed.
        COMMAND: app("/Library/PreferencePanes/Growl.prefPane/Contents/Resources/GrowlHelperApp.app").register({:all_notifications=>["success", "pending", "failed", "notify"], :as_application=>"Guard", :default_notifications=>"notify"})
    from /Users/jayparteek/.rvm/gems/ruby-1.9.2-head@guard2/gems/rb-appscript-0.6.1/lib/appscript.rb:642:in `method_missing'