How do I restart Docker for Mac from the terminal?

Specifically for Docker for Mac, because it's a "GUI" app, there's a workaround:

osascript -e 'quit app "Docker"'

Since you'd want to restart, here's the way to open it from the command line:

open -a Docker

There's probably a more symmetrical command to open using osascript, but the open command seems more common than the osascript one.

The following command worked for me:

killall Docker && open /Applications/Docker.app

Docker takes a while to initialize.

osascript -e 'quit app "Docker"'; open -a Docker ; while [ -z "$(docker info 2> /dev/null )" ]; do printf "."; sleep 1; done; echo ""