To install R-semantic.assets, run the following command in macOS terminal (Applications->Utilities->Terminal)
sudo port install R-semantic.assets
To see what files were installed by R-semantic.assets, run:
port contents R-semantic.assets
To later upgrade R-semantic.assets, run:
sudo port selfupdate && sudo port upgrade R-semantic.assets
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.