This is the easy way - just launch Docker.app and wait for it to finish loading.
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)The docker daemon might already be running, but if necessary you can use the following commands to start it:
# as a system service
sudo systemctl enable --now docker
# manually
dockerdIf you have issues running Docker, try adding your user to the docker group, and/or updating the socket file permissions, or try running these commands under sudo.