https://itnext.io/upgrading-bash-on-macos-7138bd1066ba > One thing that many macOS users don’t know is that they are using a completely outdated version of the Bash shell. However, it is highly recommended to use a newer version of Bash on macOS, because it enables you to use useful new features. This article explains how to do this. > To see how outdated the Bash version included in macOS is, execute the following command: