Dev channel no longer required for Mac.

chrome/common/extensions/docs/static/getstarted.html

 <div id="pageData-name" class="pageData">Tutorial: Getting Started (Hello, World!)</div>
 <div id="pageData-showTOC" class="pageData">true</div>
 
 <p>
 This tutorial walks you through creating a simple extension.
 You'll add an icon to Google Chrome
 that, when clicked, displays an automatically generated page.
 The icon and page will look something like this:
 </p>
 
 <img src="images/hello-world-small.png"
   width="300" height="221"
   alt="a window with a grid of images related to HELLO WORLD" />
 
-
-<h2 id="browser">Get your browser ready</h2>
-
 <p>
-Extensions are supported on the normal,
-"stable channel" release of Google Chrome for Windows.
-To develop extensions on Linux or Mac,
-you need to get on an early access release channel of Google Chrome.
+You can develop extensions using any release of Google Chrome,
+on Windows, Mac, or Linux.
 </p>
 
-<ul>
-  <li> <b>Windows</b>: Use any release of Google Chrome </li>
-  <li> <b>Linux</b>: Subscribe to the <a href="http://www.google.com/landing/chrome/beta/">Beta channel</a> </li>
-  <li> <b>Mac</b>: Subscribe to the <a href="http://www.chromium.org/getting-involved/dev-channel#TOC-Mac">Dev channel</a> </li>
-</ul>
-
 <h2 id="load">Create and load an extension</h2>
 <p>
 In this section, you'll write an extension
 that adds a <em>browser action</em>
 to the toolbar of Google Chrome.
 </p>
 
 <ol>
   <li>
     Create a folder somewhere on your computer to contain your extension's code.
@@ skipping 135 matching lines @@
   <li>
     Look at some
     <a href="samples.html">sample extensions</a>
   </li>
   <li>
     Watch some
     <a href="http://www.youtube.com/view_play_list?p=CA101D6A85FE9D4B">videos</a>, such as
     <a href="http://www.youtube.com/watch?v=e3McMaHvlBY&feature=PlayList&p=CA101D6A85FE9D4B&index=3">How to build an extension</a>
   </li>
 </ul>