Not proper to have OSX specific dependencies in the gem.

Gemfile

@@ -1,13 +1,12 @@
 source :rubygems
 
 gem "rack"
+gem "rake"
 
 group :test do
   gem "rack-test", :require => "rack/test"
   gem 'minitest', :require => 'minitest/spec'
   gem 'guard'
   gem 'guard-minitest'
-  gem 'rb-fsevent'
-  gem 'growl_notify'
 end
 

Gemfile.lock

@@ -1,8 +1,6 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    growl_notify (0.0.1)
-      rb-appscript
     guard (0.7.0)
       thor (~> 0.14.6)
     guard-minitest (0.4.0)
@@ -11,18 +9,16 @@ GEM
     rack (1.3.0)
     rack-test (0.5.7)
       rack (>= 1.0)
-    rb-appscript (0.6.0)
-    rb-fsevent (0.4.3.1)
+    rake (0.9.2)
     thor (0.14.6)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  growl_notify
   guard
   guard-minitest
   minitest
   rack
   rack-test
-  rb-fsevent
+  rake