$ sudo port selfupdate Password: Error: Current platform "darwin 15" does not match expected platform "darwin 14" Error: If you upgraded your OS, please follow the migration instructions: https://trac.macports.org/wiki/Migration OS platform mismatch while executing "mportinit ui_options global_options global_variations" Error: /opt/local/bin/port: Failed to initialize MacPorts, OS platform mismatc