How to clean up Docker for Mac containers I'm using Docker for Mac Version 1.12.0-beta21 (build: 11019) on OS X 10.11.6. The container folder in $HOME/Library/Containers/com.docker.docker contains 3.1 GB of space. docker images -a however only shows one image which is 330 MB.

How can I clean up the container folder, so that it only contains the images I'm able to use?

Update

There is an open issue regarding this problem: https://github.com/docker/for-mac/issues/371
try:

docker system prune -a


https://docs.docker.com/engine/reference/commandline/system_prune/


  Remove all unused containers, networks, images (both dangling and
  unreferenced), and optionally, volumes.