Keep getting Could not read CA certificate when trying to start docker

Question

I am attempting to migrate from boot2docker to docker-machine.

I followed the directions here to install docker but I keep getting the following message:

Answer 1

Please follow this guide: Docker for Mac vs Docker Toolbox

Worked for me, you need to unset the variables instead of creating them for mac.

# grep for DOCKER ENV vars
env | grep DOCKER
unset <DOCKER_VARS>

Answer 2

My solution in macOS to clean the reference to the missing certs, that were not in ~/.bash_profile or ~/.bashrc was:

unset ${!DOCKER*}

Source: https://forums.docker.com/t/initial-install-of-docker-for-mac-could-not-read-ca-certificate/9170/7