$BASH_VERSION reports old version of bash on macOS, is this a problem that should be fixed?

by

It means that the shell you’re in is Bash 3.2, but bash points to Bash 5.0. Try bash and then, in the new shell, echo $BASH_VERSION – I guess it’ll be 5.0. To change your login shell, add /usr/local/bin/bash to /etc/shells and change the default shell with

chsh -s /usr/local/bin/bash
sudo chsh -s /usr/local/bin/bash

After logging out and in again, $BASH_VERSION should be updated.

As for shebang lines, I recommend

#!/usr/bin/env bash

as it’s portable and will use the first Bash in your $PATH.

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