Virtual box or "provider" needs to be installed

[acrobat888]

Would recommend having a "required software section" for the setup. For example:

1) Mac Prerequisites
	a. Update to latest MacOS X (12+)
	b. Install virtualbox
		i. https://www.virtualbox.org/wiki/Downloads
	c. Install Xcode command line tools
		i. Brings along GIT and other tools
		ii. You can do this by just typing 'git' on command line in Terminal
		iii. Following instructions when they appear

Otherwise you will get a few errors and when you run the command: vagrant up --provision
_No usable default provider could be found for your system.

	Vagrant relies on interactions with 3rd party systems, known as
	"providers", to provide Vagrant with resources to run development
	environments. Examples are VirtualBox, VMware, Hyper-V.
	
	The easiest solution to this message is to install VirtualBox, which
	is available for free on all major platforms.
	
	If you believe you already have a provider available, make sure it
	is properly installed and configured. You can see more details about
	why a particular provider isn't working by forcing usage with
	`vagrant up --provider=PROVIDER`, which should give you a more specific
	error message for that particular provider._

[steadykhoi]

Sounds like a good idea. Do you mind open a pull request? It won't be merged directly to this repo but it will be updated once the internal repo is updated.