Starting with macOS Catalina zsh is the default [1] shell.

[1] https://support.apple.com/en-us/HT208050

TIL zsh is more than 20 years old

https://en.wikipedia.org/wiki/Z_shell

sudo port install bash && echo /usr/local/bin/bash | sudo tee -a /etc/shells && chsh -s /usr/local/bin/bash

... and then you run a script that depends on `/bin/bash` .. but uses a feature (e.g. coproc, associative arrays) from a version less than a decade old. And then you go and update your PATH and shebang lines to call out `/usr/bin/env bash` and hope things go right.

Something like that, but they changed the default shell to zsh, which is newer.

I thank Apple for going to zsh- forcing me to begin learning it and now I have it on all my mzchiesn.

I find your misspelling of "machines" charming.

I am continually boggled by what my iPhone corrects and doesn’t correct.

I prefer linux, but it is quite easy to install different shells on macOS.