I have Docker installed on my Mac OS Catalina and recently found very big file Docker.raw. It is 64 Gb.
I don’t understand why is it so big.
Is it really needed?
Ask Different is a question and answer site for power users of Apple hardware and software. It only takes a minute to sign up.Sign up to join this community
Docker for Mac stores Linux containers and images in a single, large file named Docker.raw. To reduce its size, after having pruned the unused docker objects ( https://docs.docker.com/config/pruning/ ), open the Docker Desktop preferences, and then under 'Resources' -> 'Advanced' -> 'Disk image size':
You can reduced file to less than 64GB. it's telling you how much is currently used by the current data. Also Resizing to a smaller size will delete the disk image; all Docker images / containers will be lost. Other settings will be preserved.
If you want to preserve the image, you can use this script : clean-docker-for-mac.sh
The script do this :
The answer to your question is in the Docker documentation:
Disk utilization in Docker for Mac
Docker Desktop stores Linux containers and images in a single, large “disk image” file in the Mac filesystem. This is different from Docker on Linux, which usually stores containers and images in the /var/lib/docker directory.
The size of this file is big in your system because you have a lot of images and containers. You can reduce its site by pruning unused objects.
The easiest way to reduce Docker.raw file size is by setting the preferences, as Docker official page states:
Select the Docker icon and then select Preferences > Resources > Advanced.