Configure Apache DS

First, download Apache DS.

Currently, there is an unresolved bug in the Apache DS for Mac.

As a workaround, use Vim to edit the application directly.

$ vim /Applications/ApacheDirectoryStudio.app/Contents/Eclipse/ApacheDirectoryStudio.ini

Add --add-modules=ALL-SYSTEM as the last line in the ini file.

Save and quit. Now your Apache DS should start successfully.