I have a docker named volume called "app_data". I simply want to export this volume so that I can move it to a different host machine.

After some reading, I understand there're 2 ways of doing this.

1. Retrieve the volume file from host file system as discovered by the command docker volume inspect app_data
2. Create a TAR ball export from docker volume using a command close to docker run --rm --volumes-from database -v $(pwd):/backup debian:jessie tar cvf /backup/backup.tar /app_data

However, I cannot get either one of these options to work for me.

1. Option 1 is not working for me as I am running this on a Mac and what docker volume inspect app_data gives me is the path of the VM file system. Is there a way to access this file from VM to my Mac?
2. Option 2 is not working as it fails saying tar: Removing leading '/' from member names tar: /app_data: Cannot stat: No such file or directory Am i using this command correctly?

I am looking for the minimal set of commands to get this job done. Appreciate your help. Thanks!