STEP-1 is the first example from the official DEAL.II example directory. It is included here primarily to illustrate the steps necessary to run a program that uses DEAL.II.
Before doing anything with deal.ii on a Macintosh running OSX, you have to:
PATH=/Applications/Cmake.app/Contents/bi:${PATH}
Then you might want to try running an example. DEAL.II has an examples directory, and the first example is in the step-1 subdirectory. I would recommend making your own working directory, and copying from the examples/step-1 directory the following two files
Now in that directory, you need to create, one time, the necessary makefile, by issuing a command something like:
cmake -DDEAL_II_DIR=/Applications/deal.II.app/Contents/Resources .
If all goes well, then you can run the step-1 example by
make run
Files you might find useful:
You can go up one level to the DEALII directory.