Firstly, download BoxLib from github. git clone https://github.com/BoxLib-Codes/BoxLib Correct the paths in the GNUMakefile in Euler_EB/Src. To compile Euler_EB cd Euler_EB/Src adjust the GNUMakefile, set the correct compilers/options. For instance, set USE_MPI=FALSE for serial runs. "make" at the command prompt will probably work of the shelf. If not, go to BoxLib/Tools/C_mk/comps and edit the compilers Also adjust the Make.unknown in BoxLib/Tools/C_mk/sites for MPI compilation. You will also need VisIt 2.12 for visualization. Mac notes ========= The original MAC gcc from command line tools does not install gfortran. use macports to install gcc $sudo port install gcc6 $port select --summary will tell you the package name for gcc $port select --set gcc <packagename> Do the same for installing openmpi-gcc6