This does 80% of the work of setting up a Mac the way I like it:

xcode-select --install
git clone git:https://github.com/notahat/dotfiles ~/.dotfiles
cd ~/.dotfiles
export DOTFILES_ENV=home
./install

I re-run this frequently (it's idempotent), which ensures I maintain it.

I remove anything I'm not using to keep it simple.

./install runs steps from the steps directory. You can run individual steps, or the whole set. See ./install -h for usage.

All my config files live under config. These get soft-linked into place by the steps.

The environments directory contains separate Brewfiles and mise.toml files for my home and work machines.

Homebrew installs anything where I always want the latest version, including apps from the Mac App Store.

Mise manages things like languages, where I want particular versions installed.