MacOS Monetary c++ compilation with Boost Library

Question

I'm compiling some code which uses Boost multiprecision and when I go to call the library with

#include <boost/multiprecision/mpfr.hpp>

Compilation gives the following error:

./main.hpp:3:10: fatal error: 'boost/multiprecision/mpfr.hpp' file not found
#include <boost/multiprecision/mpfr.hpp>
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

any ideas how to fix?