Background

Mac's default shell in Catalina onwards is set to zsh. Irrespective of the reasons, I want to change my default shell to bash. There are command line options to do so too.

How to change to bash?

Find out list of available shells

$ cat /etc/shells
# List of acceptable shells for chpass(1).
# Ftpd will not allow users to connect who are not using
# one of these shells.

/bin/bash
/bin/csh
/bin/dash
/bin/ksh
/bin/sh
/bin/tcsh
/bin/zsh

How to change to bash via command line

$ chsh -s /bin/bash

$ bash --version
GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin19)
Copyright (C) 2007 Free Software Foundation, Inc.

Although you can use brew to upgrade to latest version of bash, I plan to stick to the one that came with Mac.

• $brew install bash --> Install bash
• $ls -l /usr/local/bin/bash --> location of the installation
• $cat /etc/shells --> Find out if the new location is in the shells
• $sudo -i --> get sudo access
• $echo /usr/local/bin/bash >> /etc/shells --> update the shells
• $chsh -s /usr/local/bin/bash --> change to the one installed by brew

How to change to bash via UI (Global Setting)

• Go to System Preferences --> Users & Groups

• Hold down the control (ctrl) key and click the User Name to open Advanced Options, and click it.

• Select the right "bash"

How to change to bash via UI for Terminal App only

• Open Terminal App

• Change the properties and use bash

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Note: If you like the instructions here, please refer it on your posts/documentation. Contact me if there are corrections needed.