Choose by workflow
A free storage treemap with paid app removal and leftover cleanup. If you need something different, compare these five options by the job they do. Choose by platform, features, and how you prefer to review files.
Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports.
People who want a free, inspectable treemap and reusable scan records.
Users interested in the classic treemap or its community successors.
Mac users who want a sunburst, cloud connections, and snapshot tools.
Mac users who prefer a free size-sorted browser to a chart.
Scroll across to compare
| Feature | DissectMac | NullDisk |
|---|---|---|
| Best fit | People who want free inspection and optional paid app/leftover cleanup. | Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports. |
| Visualization | Treemap and search | Radial map, treemap, and file list; CLI terminal treemap |
| Platforms and requirements | macOS (Intel and Apple Silicon builds) | Mac app: macOS 14+; CLI: macOS, Linux, Windows |
| Pricing and editions | Map, search, and monitor are free; Pro is listed at $12.99 once plus tax. | Direct Mac edition free with reminders; optional $9.99 one-time personal license or team seat removes reminders. App Store terms are separate. |
| Open source | No | No |
| Native macOS UI | Yes | Yes |
| Cleanup workflow | Pro moves selected files and app leftovers to Trash after review. | Review source and action: local Trash, explicit permanent removal, or backup/delete; remote and cloud actions depend on the destination. |
| Reports and portability | The overview does not establish scan-report export. Preserve any app-removal decisions and rescan the same folders in NullDisk. | CLI produces JSON/NDJSON scan reports. Third-party scan files are not directly imported into the Mac GUI. |
The overview does not establish scan-report export. Preserve any app-removal decisions and rescan the same folders in NullDisk.
People who want free inspection and optional paid app/leftover cleanup. Keep it if that matches your needs. Consider a change for a specific requirement such as a different chart, remote sources, report exports, or development cleanup.
GrandPerspective and SquirrelDisk offer free open-source analysis. OmniDiskSweeper is free on Mac. All direct Mac features in NullDisk are free with reminders; reminder removal is optional. Freeware does not necessarily mean open source.
No. Keep any historical exports you need and run a fresh scan of the same location. NullDisk does not import these apps’ saved scans or cleanup queues.