Necessary facilities

Necessary facilities:

Node, Watcher, JDK

We recommend installing Node, Watchman, and JDK using Homebrew. Run the following commands in a Terminal after installing Homebrew:

$ brew install yarn 
$ brew install node 
$ brew install watchman 
$ brew tap AdoptOpenJDK/openjdk 
$ brew cask install adoptopenjdk8

If you have already installed Node on your system, make sure it is Node 8.3 or newer.

Watchman is a Facebook tool for observing file system changes. It is highly recommended that you install it for best performance.

If you have already installed JDK on your system, make sure it is JDK 8 or newer.