Matt, another bit of information: I tried to follow one of the many protocols I found, precisely the following: wget http://cars.uchicago.edu/ifeffit/src/ifeffit.tar.gz tar xvzf ifeffit.tar.gz [I used the 1.2.8 version] sh configure --prefix=/sw at the end of this I get the following error message: === ifeffit 1.2.8 Configuration Results: === linking to PGPLOT with: /Users/stefano/Documents/Downloads/ifeffit-1.2.8/src/pgstub/libnopgplot.a === === could not find TERMCAP Libraries : 'make' will fail. === === Please set TERMCAP_LIB in src/cmdline/Makefile or use the === --termcap-link argument before running make stefano% --termcap-link tcsh: --termcap-link: Command not found. I am not sure what should I do when I read: "Please set TERMCAP_LIB in src/cmdline/Makefile or use the --termcap-link argument before running make" ...Stefano