How to set my default shell on Mac?

Question

I do not like to retype fish every time I start terminal. I want fish on by default. How can I set fish shell as my default shell on a Mac?

Answer 1

On macOS Mojave I had to do the following (using zsh as an example):

brew install zsh
sudo sh -c "echo $(which zsh) >> /etc/shells"
chsh -s $(which zsh)