I just tried to install the "Prerequisite Libraries" with Terminal after I had successfully installed Xcode and MacPorts. The last installation command "sudo /opt/local/bin/port install wxWidgets-devel" resulted in an error: Computing dependencies for wxWidgets-develError: Unable to execute port: invalid command name "vercmp". What can I do? Or will the last installations (OpenNI etc.) work without this library? Thanks for help! Best regards, Horst