Neither my IT support nor my students were capable to install PSPP through MacPorts. Therefore, I am very grateful for the mpkg packages prepared by Jeremy Lavergne
up to OS X 10.8. My alternative suggestion to students with a Mac is to install an Oracle Virtual Box, a Lubuntu Operating system on the Virtual Box and then install PSPP from the appropriate Synaptic Package server. It seems that not all of these servers
are fully up to date and I had to add the czech repository. At least on my Windows system it works.
BTW: Installing PSPP on Windows takes 2 minutes.
Thanks to the developers and to Jeremy!
Beat Hulliger