To install a specific version of Node, and even use multiple versions you can use nvm.
brew install npm
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.34.0/install.sh | bash
Be carfull if you hare behind a proxy
After installtion is done, you can open a new terminal window and run
nvm install v12.3.1 to install version 12.3.1 or any other version. Check available versions with
After instalation is done, you can switch node version with
nvm use nvm 12.3.1
node -v to confirm everything is ok.