I recommend not changing the default shell, but rather having Terminal.app (or whatever) start the shell of your choice (in my case: /opt/local/bin/bash). You c

I recommend not changing the default shell, but rather having Terminal.app (or whatever) start the shell of your choice (in my case: /opt/local/bin/bash). You can't trust that the files in /opt/local or /usr/local will always be there, whereas the ones bundled by macos will.