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