From Docker's documentation, I read both Docker for Mac and the Docker Toolbox can coexist.
So I thought I could use these images created by Docker for Mac, but when I switched to Docker Toolbox, it turned out that I was wrong, because I entered docker images in Docker Quickstart Terminal.app and no image was listed.
Is there a way to achieve this?
Docker-for-Mac sets up a small virtual machine via hyperkit, which is a xhyve-based virtualization solution.
The quickstart terminal also sets up a small virtual machine, but it uses the docker-machine tool to create a virtualbox VM.
Both of these approaches are valid approaches to get a running Docker-in-a-vm-on-your-mac, but they are different VMs.
Similarly, if I have a regular linux machine at my desk, and I pull an image, you won't see that image in the docker daemon on the linux machine at your desk.
Both tools can coexist, but they don't share data.