1# install Homebrew
2# /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
3
4# install Bash via Homebrew
5brew update && brew install bash
6
7# Add the new shell to the list of allowed (white-listed) shells
8# sudo bash -c 'echo /usr/local/bin/bash >> /etc/shells'
9echo "$(brew --prefix)/bin/bash" >> /etc/shells
10
11# Change to the new shell
12chsh -s $(brew --prefix)/bin/bash
sudo -i let’s you switch to root userbrew --prefix gives you the location of Homebrew install directory (/usr/local by default)cat /etc/shells gives you the list of allowed shells