Install Yarn with Node LTS in Mac using Homebrew

install.sh

# remove yarn and node installed versions
brew uninstall yarn
brew uninstall node

# install node LTS (last LTS version is 12)
brew install node@12

# create symlink for other packages knowing you already have node installed
ln -s /usr/local/opt/node@12 /usr/local/opt/node

# install yarn without dependencies
brew install yarn --ignore-dependencies

# check yarn and node versions
echo "Yarn Version: $(yarn --version)"
echo "Node Version: $(node --version)"