Thanks for the question, @mike!
We recently reworked our developer documentation, and it looks like the OSX setup instructions omitted a step (which is present for other targets), namely that we currently require editing your host files and defining an alias on localhost:
127.0.0.1 dockerhost
This isn’t strictly necessary, of course, but it makes things a bit more flexible if you ever host your Docker development environment somewhere other than localhost.
Hope that helps! We’ll patch up our documentation 