これは事件です:
Mac:~ Swanros$ sudo gem install cocoapods
+Building native extensions. This could take a while...
ERROR: Error installing cocoapods:
ERROR: Failed to build gem native extension.
rake RUBYARCHDIR=/Users/Swanros/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/gems/2.0.0/gems/xcodeproj-0.14.0/ext RUBYLIBDIR=/Users/Swanros/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/gems/2.0.0/gems/xcodeproj-0.14.0/ext
/Users/Swanros/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/site_ruby/2.0.0/rubygems/dependency.rb:296:in `to_specs': Could not find 'rake' (>= 0) among 9 total gem(s) (Gem::LoadError)
from /Users/Swanros/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/site_ruby/2.0.0/rubygems/dependency.rb:307:in `to_spec'
from /Users/Swanros/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_gem.rb:47:in `gem'
from /Users/Swanros/.rvm/gems/ruby-2.0.0-p247/bin/rake:22:in `<main>'
Gem files will remain installed in /Users/Swanros/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/gems/2.0.0/gems/xcodeproj-0.14.0 for inspection.
Results logged to /Users/Swanros/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/gems/2.0.0/gems/xcodeproj-0.14.0/ext/xcodeproj/gem_make.out
Mac:~ Swanros$
どうすればこれを解決できますか?Xcode 5 コマンド ライン ツールが既にインストールされている OS X Mavericks を実行しています。