Docker Ate Your Disk: Reclaiming 20-50GB on macOS

Docker Desktop was using 67GB on my Mac. I didn't notice until my build failed with "no space left on device" and I started digging. 67GB. For containers I hadn't run in months, images I'd pulled once for a quick test, build cache from projects I'd abandoned, and a VM disk file that had ballooned to 40GB and refused to shrink. If you're a developer running Docker on macOS, you're almost certainly in the same situation. Docker is designed to cache aggressively and clean up never. On Linux, Docker