My Ubuntu-friend told me to testrun a Beanshell script by doing: bsh #filename# and when I told him that I don't know what bsh is nor have it he told me: sudo apt-get install bsh Being on a Mac I instead ran: sudo port install beanshell But still no bsh command available. A listing of the package content revealed a jar file named: /opt/local/share/java/bsh.jar but when I try to run that with my script file a complete Window manager written in Java starts up (and does not run the script file btw). Now, clearly I am doing something wrong, I am sure there must be a way of running beanshell scripts on a mac terminal although it does seem more natural for the linux users. What am I doing wrong and what should I do to run that script?