Flare Scan

What Flare Scan is

Flare Scan is a free, open-source macOS tool for reviewing disk and memory use and comparing storage scans. Select a folder or volume to explore it in an interactive Sunburst or Treemap view, with file-type categories and rankings of the largest files. It can scan external drives, identify exact duplicates, and flag review candidates larger than 100 MB that have not changed for 180 days. An optional local baseline lets users compare scans and see which files appeared, grew, shrank, or disappeared. Memory Watch tracks app resident memory, process counts, session peaks and averages, recent trends, and approximate foreground time. Reports can be exported as versioned JSON or CSV, including findings, categories, duplicates, scan issues, and available timeline changes. Cleanup requires confirmation and containment checks, then moves selected items to macOS Trash. The project says it has no account, telemetry, cloud service, networking code, or third-party runtime dependencies. It requires macOS 14 Sonoma or newer; the checked-in build targets Apple Silicon and is ad-hoc signed, not Apple-notarized. First launch may require choosing Open from the right-click menu.