Quickstart step 3: (macOS) Start Docker

Option A: Docker for Mac

This is the easy way - just launch Docker.app and wait for it to finish loading.

Option B: docker-machine

The Docker daemon should be running in the background, which you can test by running docker ps. If you're on OS X and using docker-machine instead of Docker for Mac, you may have to run:

docker-machine start default
eval $(docker-machine env)

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