untagged in docker rmi code example

Example 1: remove all docker images

# List all containers (only IDs)
docker ps -aq
# Stop all running containers
docker stop $(docker ps -aq)
# Remove all containers
docker rm $(docker ps -aq)
# Remove all images
docker rmi $(docker images -q)

Example 2: docker for mac remove unnamed images

docker rmi $(docker images | grep "^<none>" | awk "{print $3}")