Added a note on getting 404 Not Found errors when loading the database.
diff --git a/Mac/OSXResources/app/Resources/English.lproj/Documentation/packman.html b/Mac/OSXResources/app/Resources/English.lproj/Documentation/packman.html
index 66eec88..7eef257 100644
--- a/Mac/OSXResources/app/Resources/English.lproj/Documentation/packman.html
+++ b/Mac/OSXResources/app/Resources/English.lproj/Documentation/packman.html
@@ -35,8 +35,18 @@
you about this, and also about other external dependencies.</p>
<p>PackageManager is available as a separate application and also
- as a function of the IDE, through the File->Package Manager menu
+ as a function of the IDE, through the <tt>File->Package Manager</tt> menu
entry. </p>
+
+ <h2>Troubleshooting</h2>
+
+ <p>If package manager fails to open the database first check that you are
+ connected to the internet. If you are connected then the problem
+ could be that there is no database (yet?) for your version of Mac OS X.
+ In the standalone Package Manager you can open an alternative database
+ with the <tt>File->Open URL...</tt> command, but you should realize that
+ you are now on untested ground. </p>
+
</td>
</tr>
</table>