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Docker.raw: Why Your Mac Is Full When Docker Looks Empty
Deleting Docker images does not always free Mac disk space. We explain the Docker.raw sparse file and how to actually reclaim those gigabytes.
- Docker
- Developer
- Storage
You ran docker system prune. Docker Desktop says everything is clean. macOS still shows disk almost full.
The Docker.raw problem
Docker on Mac stores data in a virtual disk file, often:
~/Library/Containers/com.docker.docker/Data/vms/0/data/Docker.raw
It can grow to 60 GB+ but rarely shrinks when you delete images inside Docker.
What actually frees space
- Remove unused images and volumes inside Docker.
- If the file is still huge, Docker’s Reset to factory defaults (nuclear) or manual removal after quitting Docker.
- Use a disk map to confirm the real allocated size — APFS sparse files lie on Finder’s summary.
FreeUpMac marks Docker.raw blocks with a Caution badge so you do not delete it by accident while Docker is running.
Developer tip
Scan This Mac once a quarter if you use Docker daily. The block stays visible on the map even when docker ps is empty.