Unable to find MACCS COTS installer

When running sen2agriPlatformInstallAndConfig.sh I am asked for a path to ‘maccs’ executable. What is it and how to get that?

MACCS is the atmospheric corrections processor provided by CNES. It is not part of the system distribution and it should be separately installed. Please read the chapter 3 (section 3.2 specially) of the Software User Manual for further instructions.