ruby-on-rails - Sublime Text 3 Mac で LESS2CSS プラグインを使用して LESS を CSS にコンパイルできない

Question

Mac OS Yosemite で Sublime Text 3 を使用しています。LESS2CSS パッケージを使いたいのですが、うまくいきません。これが与えるエラーは次のとおりです。

WARNING] Please install gem 'therubyracer' to use Less.
/Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:54:in `require': cannot load such file -- v8 (LoadError)
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /Library/Ruby/Gems/2.0.0/gems/less-2.6.0/lib/less/java_script/v8_context.rb:2:in `<top (required)>'
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /Library/Ruby/Gems/2.0.0/gems/less-2.6.0/lib/less/java_script.rb:9:in `default_context_wrapper'
    from /Library/Ruby/Gems/2.0.0/gems/less-2.6.0/lib/less/java_script.rb:17:in `context_wrapper'
    from /Library/Ruby/Gems/2.0.0/gems/less-2.6.0/lib/less/loader.rb:13:in `initialize'
    from /Library/Ruby/Gems/2.0.0/gems/less-2.6.0/lib/less.rb:14:in `new'
    from /Library/Ruby/Gems/2.0.0/gems/less-2.6.0/lib/less.rb:14:in `<module:Less>'
    from /Library/Ruby/Gems/2.0.0/gems/less-2.6.0/lib/less.rb:9:in `<top (required)>'
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /Library/Ruby/Gems/2.0.0/gems/less-2.6.0/bin/lessc:3:in `<top (required)>'
    from /usr/bin/lessc:23:in `load'
    from /usr/bin/lessc:23:in `<main>'

をインストールしてNode.jsインストールしましlessたが、まだ機能していません。