I downloaded the toolbox from http://www.levmuchnik.net/Content/Networks/ComplexNetworksPackage.html
the latest version 64 bit for Mac computer. The instructions on the site report:
Build the x32 or the 64-bit version depending on the version of MatLab you have and add the obtained binaries along with the corresponding m-files to the main Graph folder.
The problem is that I can't find any executable file. I simply don't know which file to execute, what to do.
I already searched around this forum and so on, but no progress.
Assuming you downloaded the 64-bit MAC package with pre-build binaries (ComplexNetworksPackage.1.6.Mac64.zip), the binary executable files are included. They are the files ending in the .mexmaci64. Just unzip the file in to some directory, then either add that directory to your path (addpath or pathtool) or cd to that directory in MATLAB. At that point you should be able to run the MEX functions by name (e.g. for mexGraphAllNodeNeighbours.mexmaci64, run mexGraphAllNodeNeighbours at the MATLAB command prompt). Note that there are companion M-files with the same name as the MEX files that usually contain documentation, but occasionally contain a M file only implementation if a valid MEX-file is not available. Anyway, to check that you have for example mexGraphAllNodeNeighbours on your path,
which -all mexGraphAllNodeNeighbours
If it doesn't list the MEX-file, check your path and verify that you have the right platform (MAC 64-bit and 64-bit MATLAB installed).
Alternatively, you can download the source (ComplexNetworksPackage.1.6.Sources.zip) and build the MEX-files, but I wouldn't advise you to do that unless you have no choice.