Which fits your needs?
DissectMac: People who want free inspection and optional paid app/leftover cleanup.
JDiskReport: Users who want cross-platform disk statistics and already use Java.
Features, pricing, and workflow
Scroll across to compare
| Feature | DissectMac | JDiskReport |
|---|---|---|
| Best fit | People who want free inspection and optional paid app/leftover cleanup. | Users who want cross-platform disk statistics and already use Java. |
| Visualization | Treemap and search | Overview statistics charts and detail tables |
| Platforms and requirements | macOS (Intel and Apple Silicon builds) | macOS, Windows, Linux (Java) |
| Pricing and editions | Map, search, and monitor are free; Pro is listed at $12.99 once plus tax. | No-charge, ad-free freeware; this does not mean open source. |
| Open source | No | No |
| Native macOS UI | Yes | Cross-platform interface |
| Cleanup workflow | Pro moves selected files and app leftovers to Trash after review. | Use the statistics to guide file review; the cited overview does not specify removal semantics. |
| Reports and portability | The overview does not establish scan-report export. Preserve any app-removal decisions and rescan the same folders in NullDisk. | Preserve any saved scan files supported by your version and keep important table entries. NullDisk does not import JDiskReport scan files. |
DissectMac: what stands out
A good fit for people who want free inspection and optional paid app/leftover cleanup.
DissectMac: strengths
- Free map, file search, and live monitor
- Filters for developer files and large storage categories
- Pro uninstaller and app-leftover cleanup
Considerations
- In-app clearing and uninstallation require Pro
- Treemap is the documented graphical view
- Confirm suspected leftovers belong to apps you no longer need
JDiskReport: what stands out
A good fit for users who want cross-platform disk statistics and already use Java.
JDiskReport: strengths
- Disk usage statistics in charts and tables
- Runs across Java-capable desktop systems
- Free without ads or expiry
Considerations
- Requires a compatible Java runtime
- Freeware rather than an open-source project
- Check the manual for report storage and file-management actions
For a useful comparison on your own drive, match the scan root, access permissions, and size mode. Chart style changes how you explore the results; it does not by itself establish measurement accuracy.
Common questions
When should I choose DissectMac?
A good fit for people who want free inspection and optional paid app/leftover cleanup. Map, search, and monitor are free; Pro is listed at $12.99 once plus tax.
When should I choose JDiskReport?
A good fit for users who want cross-platform disk statistics and already use Java. No-charge, ad-free freeware; this does not mean open source.
Will both apps show the same size?
Not necessarily. Match the scan root, permissions, exclusions, and logical/allocated-size mode. Hard links, APFS clones, snapshots, sparse files, and cloud placeholders can change totals. A reported size is not a guaranteed amount recovered after deletion.