MacOS X v10.9.4, mmex v 1.1.0
Clicking Help in left hand pane does not bring up help
Menu Item Help>Help does not bring up help
Help>Show App Start Dialog> Read Documentation results in error message seen in attachment
You seem to have CSS turned off.
Please don't fill out this field.
This is now corrected in the mac release on GitHub (sourceforge and other mirrors will be updated soon). You can download the new build or fix the one you have by right-clicking mmex.app and selecting "Show Package Contents". Move the folder at Contents>SharedSupport>doc>mmex>help up two levels to Contents>SharedSupport>help.