How to create a droplet from docker-machine

A few weeks ago, I created a droplet using docker-machine by following these articles as my guide:

https://docs.docker.com/machine/examples/ocean/ https://www.digitalocean.com/community/tutorials/how-to-provision-and-manage-remote-docker-hosts-with-docker-machine-on-ubuntu-16-04

Everything worked fine and I was able to see the droplet on my dashboard.

Since then I upgraded from Mountain Lion to El Capitan and re-installed docker toolbox. I don’t recall the versions of docker the docker toolbox loaded previously, but now I’m using:

docker-machine version 0.7.0, build a650a40

docker-compose version 1.7.1, build 0a9ab35 docker-py version: 1.8.1 CPython version: 2.7.9 OpenSSL version: OpenSSL 1.0.1j 15 Oct 2014

docker version Client: Version: 1.11.2 API version: 1.23 Go version: go1.5.4 Git commit: b9f10c9 Built: Wed Jun 1 21:20:08 2016 OS/Arch: darwin/amd64

Now, when I try to create a new droplet using docker-machine I get the following error:

docker-machine create --driver digitalocean --digitalocean-access-token xxxxx docker-sandbox Running pre-create checks… Creating machine… (docker-sandbox) Creating SSH key… (docker-sandbox) Creating Digital Ocean droplet… Error creating machine: Error in driver during machine creation: POST https://api.digitalocean.com/v2/droplets: 422 You specified an invalid image for Droplet creation.

Has something changed in the DigitalOcean API in the last few weeks that now causes this command to fail? Does El Capitan not support this ability with Docker? Or, am I missing some important component when I did the re-install?

I sure would like to be able to use this capability, as it seems like it would be very beneficial.

Thanks in advance for any assistance you can offer.