Install Brew on a M1 Mac

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
echo 'eval "$(/opt/homebrew/bin/brew shellenv)"' >> ~/.zprofile
eval "$(/opt/homebrew/bin/brew shellenv)"

Usage

Run uname -m in the Terminal of your choice and verify it outputs arm64

Run the command above

If you have not installed the Xcode Command Line Tools, brew will automatically install them for you

After the installation completes, run brew doctor

If the output of brew doctor is Your system is ready to brew., you are done

If brew doctor returns issues, resolve them according to the provided instructions

You may want to set up Homebrew’s shell-completion at this time

Resources

If you are not using the M1 chip, use this snippet instead

Homebrew Documentation

Homebrew Documentation: Configuring Completions in zsh