I want to use python24 provided by ports, so I've installed it, and python_select -s shows that the version I want is indeed selected. Running which python gives /opt/local/bin/python, and running /opt/local/bin/python gives me the version I want. However when I run python from the shell, I get the /usr/bin/python version instead. I don't have a python alias. Here's the situation in a nutshell: I believe the path is set up sensibly, and which python seems to confirm this. alias only returns 1 entry, which is something unrelated to this. Nevertheless, running python from the bash shell gives me the wrong python! I'm kind of stumped! What am I overlooking?