맥의 배쉬 버젼을 업그레이드 하는 법

admin☠  echo $BASH_VERSION
3.2.53(1)-release

# Update homebrew and install bash
admin☠  brew update && brew install bash
# Add the new shell to the list of allowed shells
admin☠  sudo bash -c 'echo /usr/local/bin/bash >> /etc/shells'
# Change to the new shell
admin☠  chsh -s /usr/local/bin/bash 

admin☠  echo $BASH_VERSION
4.4.12(1)-release