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GUI features

Menu bar

The menu bar extra shows customizable metrics (CPU, memory, container counts, etc.) with per-container quick actions. Configure which metrics appear and their order in Settings → Menu bar. The menu bar also includes an Open Macker action that focuses the existing window instead of spawning a new instance.

Storage & cleanup

The native runtime stores each image as a full ext4 snapshot (no layer deduplication like Docker's overlay2), so storage can grow quickly. Macker provides:

  • GUI: Settings → Storage — disk usage, prune unused images, prune all images, delete the buildkit builder, and full cleanup.
  • CLI: docker system prune [-a] [--builder] — --builder also deletes the buildkit builder (frees the build cache).