title: Store Docker image files on external drive in macOS
body: <p>I'm using a Mac Book Pro with 128Gb disk. Is there any way to have the Docker images be stored on an external hard drive rather than on the Mac's main drive?</p>
  <p>I don't have that much free space, and can't afford to remove any installed software. Ideally I'd like to have Docker fetch the images from an external drive. Can this be done using a symlink?</p>