Mac: Virtual Shell Bash Version does not Match Installed Version [duplicate]

Answer 1

homebrew makes symbolic links in /usr/local/bin for everything it installs, so if you want to use homebrew-provided bash, use:

#!/usr/local/bin/bash
...
...

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If you want to see the symbolic link and where it is pointing:

ls -l /usr/local/bin/bash

lrwxr-xr-x  1 mark  admin  30 Mar 20 17:16 /usr/local/bin/bash -> ../Cellar/bash/4.4.19/bin/bash

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If you want information about homebrew bash, use:

brew info bash

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If you want to use it as your login shell (I don't like the idea personally), you need to add it to /etc/shells and use chsh command.

$ echo /usr/local/bin/bash | sudo tee -a /etc/shells
$ chsh -s /usr/local/bin/bash

then open a new terminal window and verify that it works by executing

$ echo $BASH_VERSION

Answer 2

Your shell script should start with the line:

#!/<path>/bash

Which should point to the installed bash you want. Since you seem to be contend with the bash that was found by executing bash --version, you can execute which bash to tell you where that one is.

Alternately, you can start your script with:

#!/usr/bin/env bash

Which will use the bash that is found on your PATH.