In macOS Catalina the new default shell is now zsh. After upgrading, you might see the following message when you open up terminal:
Some of you may already use zsh! If so, congratulations, this article is worthless to you. However, if you're an old bash holdout like me, read on. This is how I upgraded my setup.
First, we'll run the command like the warning states:
Enter the sudo password and the command should change the shell. Nothing will be different until you open a new terminal window.
I like to use a status line plugin called Powerline to track things like the git branch and repository state in the terminal prompt. So first we'll install powerline with
Next copy the following into your ~/.zshrc file:
The defaults for powerline are usually fine for me, except I don't like the right column, so to disable that, go to the file at .config/powerline/themes/shell/default.json and clear out the "right" section:
Now we'll make sure we have git completion enabled in zsh, run brew install git zsh-completion and copy the following into your .zshrc file
Now you should be all set up! Note that if you want to see my exact config, my dotfiles are always available here