The build procedure for macOS is the same as for Unix. The
platform name is “darwin”. If the platform
configuration check does not find a C++ compiler,
then you will have to install one. One option is the Xcode command line
developer tools provided by Apple. You can install these from a
Terminal window via the command
xcode-select --install
You should run this command even if you install the full Xcode IDE.
Refer to your system documentation for details.