After installing MySQL 5.1.54 on Mac OS X 10.6.6 (Snow Leopard) I tried to access the server in the terminal and got:
-bash: mysql: command not found
Bash could not find the path, so I had to add it. I am not that familiar with the internals of the unix terminal anyway, so I found a highly informative thread on superuser.com.
Especially the post of Jim Logan solved the issue:
Take a look at the file /etc/paths, which is used by /usr/libexec/path_helper, which is used by /etc/profile. For MacPorts, use “sudo” to append “/opt/local/bin” to the end of the /etc/paths file and reopen the terminal window.
So I opened the terminal and used nano:
sudo nano /etc/paths
and appended the line
/usr/local/mysql/bin
to the file, saved, exited, restarted the terminal …. and voila, solved.
Rforge 