To install simutrans-pak64, run the following command in macOS terminal (Applications->Utilities->Terminal)
sudo port install simutrans-pak64
To see what files were installed by simutrans-pak64, run:
port contents simutrans-pak64
To later upgrade simutrans-pak64, run:
sudo port selfupdate && sudo port upgrade simutrans-pak64
Reporting an issue on MacPorts Trac
The MacPorts Project uses a system called Trac to file tickets to report bugs and enhancement requests.
Though anyone may search Trac for tickets, you must have a GitHub account in order to login to Trac to create tickets.