Open Docker from Terminal Command on Mac

If docker is not running on your device you will see errors like below,

% docker ps

Cannot connect to the Docker daemon at unix:///var/run/docker.sock. 
Is the docker daemon running?

If you are a developer and frequently use the Terminal commands to work with Docker and wonder how to start or open it command line then you can make use of the open command,

$ open -a docker

When you will run this command in Terminal shell, you will see that the docker desktop application is loaded and will get started and then you can run all the subsequent docker commands.