Install Homebrew (brew install) on macOS 12 Monterey(What to do when 「command not found: brew」 error is displayed)

Go simple.

If you have an older version, remove it.

Open terminal and run
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/uninstall)"

After uninstalling, run this to install
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

Check if it is installed properly
brew -v

If no version information is displayed and you see the following message
command not found: brew

You have to export the path. Enter the following command.
export PATH="/opt/homebrew/bin:$PATH"

Finally this
echo 'export PATH="/opt/homebrew/bin:$PATH"' >> $HOME/.zshrc

That’s it!

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