title: Unable to launch Chrome on Mac using selenium webdriver
body: <p>I want to run my script on MAC Chrome. I performed following steps</p>
  
  <ol>
  <li>Download latest chrome driver from <a href="http://chromedriver.storage.googleapis.com/index.html" rel="nofollow">http://chromedriver.storage.googleapis.com/index.html</a></li>
  <li>Unzip the package and then copy the file to /usr/bin</li>
  </ol>
  
  <p><strong>On irb i excuted following steps</strong></p>
  
  <pre><code>require 'selenium-webdriver'
  driver = Selenium::WebDriver.for :chrome
  </code></pre>
  
  <p>It gives following error message</p>
  
  <pre><code>Net::ReadTimeout: Net::ReadTimeout
          from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/net/protocol.rb:158:in `rescue in rbuf_fill'
          from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/net/protocol.rb:152:in `rbuf_fill'
          from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/net/protocol.rb:134:in `readuntil'
          from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/net/protocol.rb:144:in `readline'
          from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/net/http/response.rb:39:in `read_status_line'
          from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/net/http/response.rb:28:in `read_new'
          from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/net/http.rb:1406:in `block in transport_request'
          from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/net/http.rb:1403:in `catch'
          from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/net/http.rb:1403:in `transport_request'
          from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/net/http.rb:1376:in `request'
          from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/net/http.rb:1369:in `block in request'
          from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/net/http.rb:852:in `start'
          from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/net/http.rb:1367:in `request'
          from /Users/vertis/.rvm/gems/ruby-1.9.3-p429/gems/selenium-webdriver-2.39.0/lib/selenium/webdriver/remote/http/default.rb:83:in `response_for'
          from /Users/vertis/.rvm/gems/ruby-1.9.3-p429/gems/selenium-webdriver-2.39.0/lib/selenium/webdriver/remote/http/default.rb:39:in `request'
          from /Users/vertis/.rvm/gems/ruby-1.9.3-p429/gems/selenium-webdriver-2.39.0/lib/selenium/webdriver/remote/http/common.rb:40:in `call'
          from /Users/vertis/.rvm/gems/ruby-1.9.3-p429/gems/selenium-webdriver-2.39.0/lib/selenium/webdriver/remote/bridge.rb:634:in `raw_execute'
          from /Users/vertis/.rvm/gems/ruby-1.9.3-p429/gems/selenium-webdriver-2.39.0/lib/selenium/webdriver/remote/bridge.rb:99:in `create_session'
          from /Users/vertis/.rvm/gems/ruby-1.9.3-p429/gems/selenium-webdriver-2.39.0/lib/selenium/webdriver/remote/bridge.rb:68:in `initialize'
          from /Users/vertis/.rvm/gems/ruby-1.9.3-p429/gems/selenium-webdriver-2.39.0/lib/selenium/webdriver/chrome/bridge.rb:29:in `initialize'
          from /Users/vertis/.rvm/gems/ruby-1.9.3-p429/gems/selenium-webdriver-2.39.0/lib/selenium/webdriver/common/driver.rb:37:in `new'
          from /Users/vertis/.rvm/gems/ruby-1.9.3-p429/gems/selenium-webdriver-2.39.0/lib/selenium/webdriver/common/driver.rb:37:in `for'
          from /Users/vertis/.rvm/gems/ruby-1.9.3-p429/gems/selenium-webdriver-2.39.0/lib/selenium/webdriver.rb:67:in `for'
          from (irb):4
  </code></pre>