Head to head
| Disk Inventory X | DissectMac | |
|---|---|---|
| Visualization | Treemap | Treemap |
| Platform | macOS | macOS |
| Pricing | Open source Free and open source; community Xs/Y builds target Apple Silicon | Freemium Free tier with paid unlocks at time of writing |
| Open source | Yes | No |
| Native Mac | Yes | Yes |
Updated September 2026 · Prices change — please verify with the vendor.
Disk Inventory X
The classic treemap visualizer, revived for Apple Silicon Macs.
＋ Disk Inventory X: Strengths
- Free and open source with decades of trust
- Treemap plus file-type breakdowns in one window
- Community revival builds run natively on Apple Silicon
－ Disk Inventory X: Weaknesses
- Interface shows its age despite the revival builds
- No collector tray, previews, or modern sandbox handling
- Fork landscape (X vs Xs vs Y) can confuse new users
Read the review: Disk Inventory X → · Disk Inventory X See alternatives →
DissectMac
A fast local treemap with uninstaller and live monitoring.
＋ DissectMac: Strengths
- Fast local treemaps with live disk monitoring
- Bundled uninstaller covers app leftovers
- Free tier for basic analysis
－ DissectMac: Weaknesses
- Treemap-only visualization; no sunburst or list-first mode
- Monitoring features overlap with free macOS tools
- Young product with a thin review record
Read the review: DissectMac → · DissectMac See alternatives →
Verdict: Disk Inventory X vs DissectMac
Choose Disk Inventory X if you want treemap visualization with open-source transparency on macOS. Choose DissectMac if you prefer treemap views at freemium pricing on macOS. And if you want a native Mac sunburst with a staged collector and zero telemetry, NullDisk is the third option that beats both on workflow.
Frequently asked questions
Which is better, Disk Inventory X or DissectMac?
Disk Inventory X wins on treemap visualization for macOS; DissectMac wins on treemap views for macOS. On price, Open source (Disk Inventory X) vs Freemium (DissectMac). The honest answer depends on your OS and whether you prefer maps or lists — read the verdict below.
Is there something better than both?
If you want a native Mac sunburst with allocated-size honesty, a staged removal collector, and zero data collection, NullDisk beats both on workflow — even where Disk Inventory X or DissectMac wins on price.