In the article above, section "Setup the deployment tools", you have the link how to install VSCode.

Here is the link how to install NodeJs: https://treehouse.github.io/installation-guides/mac/node-mac.html

I take the opportunity to add one important detail:

- instead of typing `brew install node` as in the linked article, type instead `brew install node@12`

Explanation: `@12` means that nodejs version 12 should be installed instead of the latest by default (version 14, in March 2021). This is because truffle works well with node v12.x but not with later versions (again, as of March 2021)