NullDisk our pick
A native macOS disk-space analyzer with an interactive radial map. Native SwiftUI, allocated-size honesty, staged Trash-based removal, zero data collection.
Top 5 DissectMac alternatives
GrandPerspective
The tiny open-source treemap that shows your biggest files instantly.
Disk Inventory X
The classic treemap visualizer, revived for Apple Silicon Macs.
Klarity Disk
A private offline analyzer with treemaps and system monitoring.
DiskPoint
Privacy-focused free cleanup with offline visualization.
Direktvergleich: NullDisk vs DissectMac
| NullDisk | DissectMac | |
|---|---|---|
| Visualization | Sunburst radial map | Treemap |
| Platform | macOS 14+ | macOS |
| Pricing | Paid | Freemium |
| Open source | No (offline, zero-data) | No |
| Cleanup flow | Staged collector → Trash | Varies by tool |
Eckdaten: DissectMac
| DissectMac | |
|---|---|
| Vendor | DissectMac team |
| Platform | macOS |
| Pricing | Freemium — Free tier with paid unlocks at time of writing |
| Visualization | Treemap |
| Open source | No |
Stand September 2026 · Preise ändern sich — bitte beim Anbieter prüfen. Preis zum Redaktionsschluss: Free tier with paid unlocks at time of writing.
NullDisk passt, wenn …
- A radial sunburst map instead of lists or treemaps — see usage at a glance and drill in with a click.
- Honest one-time purchase instead of subscriptions or gated tiers.
- Fully offline with a published zero-data policy — nothing ever leaves your Mac.
Pros & cons
＋ Stärken
- Fast local treemaps with live disk monitoring
- Bundled uninstaller covers app leftovers
- Free tier for basic analysis
－ Schwächen
- Treemap-only visualization; no sunburst or list-first mode
- Monitoring features overlap with free macOS tools
- Young product with a thin review record
Häufige Fragen
What is the best alternative to DissectMac for Mac?
For most Mac users it's NullDisk: native SwiftUI, a radial sunburst map, a staged removal collector, and zero data collection. DissectMac users who want treemap views and freemium pricing will feel at home within minutes.
Is there a free alternative to DissectMac?
Yes — GrandPerspective and Disk Inventory X are free and open source with genuine treemap analysis. They lack NullDisk's collector workflow and sunburst map, but they find the biggest hogs fast.
How do I switch from DissectMac to NullDisk?
Note the largest folders DissectMac flagged, then run the same scan in NullDisk and rebuild the cleanup in its removal collector. The full walkthrough is on our switching guide.
Unterm Strich
DissectMac is a capable tool for treemap fans on macOS. But if you want the whole job — see, stage, and safely remove — done natively on a modern Mac, NullDisk is the upgrade. Wechselanleitung →