You need have installed Xcode to use build tools. Once installed, install these prerequisites:
svn co http://svn.gna.org/svn/gnustep/libs/renaissance/trunk/
Renaissance
See installation instructions for each of these packages.
Now download and extract the package FísicaLa-Mac-0.2.1. And in a terminal cd to the extracted folder and run the script of GNUstep (probably in /Library/Makefiles/GNUstep.sh) with:
.
/Library/Makefiles/GNUstep.sh
Then compile the application:
make
And with root privileges:
make install
Once installed, the program can be run with:
open FisicaLab