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diff --git a/_manual/03_setting-up-your-system/07_using_more_than_one_audio_device.html b/_manual/03_setting-up-your-system/07_using_more_than_one_audio_device.html
index da51f86..379117e 100644
--- a/_manual/03_setting-up-your-system/07_using_more_than_one_audio_device.html
+++ b/_manual/03_setting-up-your-system/07_using_more_than_one_audio_device.html
@@ -43,23 +43,45 @@ that some people might not care about them.</p>
 </p>
 
 <h3>OS X</h3>
+<p>
+Aggregate devices provide a method to use multiple soundcards as
+a single device. For example, you can "aggregate" 2 different
+8-channel devices so that you can record 16 channels into Ardour.
+</p>
+
+<p>
+  If you are using a <strong>single</strong> typical 3rd party
+  audio interface (such as those from Apogee, RME, Presonus, and many
+  others), <strong>OR</strong> you are using JackPilot or a similar
+  application to start JACK, you do not need to worry about this.
+</p>
+
+<p>You will need to set up an aggregate device if either of the following conditions are true:</p>
+
+  <ul>
+    <li>You want to use two entirely separate
+      devices <strong>AND</strong> want to start JACK using Ardour.</li>
+    <li>You want to use your builtin audio device <strong>AND</strong>
+      want to start JACK using Ardour.</li>
+  </ul>
+  
+<p>In the case of your builtin audio device, you will need to create
+  an aggregate device that combines "Builtin Input" and "Builtin
+  Output" into one device.
+</p>
+
 <p>The precise instructions for creating an "aggregate device" on OS X have varied from one released to another.</p>
 
 <dl class="wide-label">
-<dt>OS X 10.5</dt>
-<dd>Please read <a href="http://support.apple.com/kb/HT1215">http://support.apple.com/kb/HT1215</a>
-</dd>
-<dt>OS X 10.6 or later<dt>
-</dt>
-</dt>
-<dd>Please read <a href="http://support.apple.com/kb/HT3956">http://support.apple.com/kb/HT3956</a>
-</dd>
+  <dt>OS X 10.5</dt>
+  <dd>
+    Please read <a href="http://support.apple.com/kb/HT1215">http://support.apple.com/kb/HT1215</a>
+  </dd>
+  <dt>OS X 10.6 or later</dt>
+  <dd>
+    Please read <a href="http://support.apple.com/kb/HT3956">http://support.apple.com/kb/HT3956</a>
+  </dd>
 </dl>
-<p>
-Aggregate devices also provide a method to use multiple soundcards as
-a single device. For example, you can "aggregate" 2 different
-8-channel devices so that you can record 16 channels into Mixbus.
-</p>
 
 <h3>Linux</h3>