So I do this vagrant up, but nothing happens. Then I simply downloaded the discourse.box by itself and added vagrant add discourse file.box and it unpacks it, thereafter nothing happens anyway. I’ve imported the vmdk into virtual box, and it quits.
The post is already updated. Per @sam I added an “update” section at the top explaining that the Discourse Vagrant development install is no longer maintained, along with links to current guides for Windows, OS X, and Ubuntu.