Mac OS X sudo docker Cannot connect to the Docker daemon. Is the docker daemon running on this host?

Question

I installed docker and there seems to be some issue.

$ docker ps

CONTAINER ID IMAGE COMMAND

Answer 1

I just had this problem. I was using the old docker-machine and I switched to the latest docker for mac. Running eval $(docker-machine env default) sets up some environment variables.

To solve my problem, I unset those environment variables...

unset DOCKER_HOST DOCKER_MACHINE_NAME DOCKER_TLS_VERIFY DOCKER_CERT_PATH