hyperModel requires GraphViz libraries to layout dynamic class diagrams ("dynagrams"). This is a platform-specific binary and only the Windows version of GraphViz is bundled with hyperModel plug-ins. You must download and install the latest Mac OSX version. Get it here: http://www.ryandesign.com/graphviz/ (or see the GraphViz download page).

Note: GraphViz version 2.12 has font problems on the Mac, so install the development version 2.13 to resolve these issues (or a later release if it is available when you read this note).

The GraphViz binary executable, named "dot", must be on the system PATH that is used to run Eclipse. To do this, you must add the GraphViz path onto your Mac OS path. If it doesn't already exist, create a .MacOSX directory in your home directory. Add a file environment.plist containing the following:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" 
        "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
   <dict>
      <key>PATH</key> <string>/bin:/usr/bin:/usr/sbin:/sbin:/usr/local/graphviz-devel/bin</string>
   </dict>
</plist>

After everything is loaded and configured, logout and back in again for the path change to take effect. You now should be able to create UML class diagrams in hyperModel!