Mac:~ user$ port
-bash: port: command not found
Mac:~ user

Mac:~ user$ cat > .bash_profile
export PATH=$PATH:/opt/local/bin
export MANPATH=$MANPATH:/opt/local/share/man
export INFOPATH=$INFOPATH:/opt/local/share/info
(ctrl+d pour sauvegarder et quitter)
Relancer "Terminal.app" 
Mac:~ user$ port
Password:
MacPorts 1.600
Entering interactive mode... ("help" for help, "quit" to quit)
[Users/user] >