Which fits your needs?
Disk Xray: Mac users seeking an analyzer plus duplicate and photo cleanup tools.
GrandPerspective: People who want a free, inspectable treemap and reusable scan records.
Features, pricing, and workflow
Scroll across to compare
| Feature | Disk Xray | GrandPerspective |
|---|---|---|
| Best fit | Mac users seeking an analyzer plus duplicate and photo cleanup tools. | People who want a free, inspectable treemap and reusable scan records. |
| Visualization | Sorted folder breakdown and cleanup lists | Treemap with configurable colors and filters |
| Platforms and requirements | macOS 10.13+ (vendor requirements) | macOS 14+ (current release) |
| Pricing and editions | Free App Store download; full functionality via subscription or lifetime purchase. The subscription includes a seven-day trial. | Free from SourceForge; the same app is $2.99 in the US App Store. |
| Open source | No | Yes |
| Native macOS UI | Yes | Yes |
| Cleanup workflow | Review each module’s action; ordinary cleanup and permanent shredding have different recovery implications. | Delete files or folders from the view; review selection and deletion preferences. |
| Reports and portability | The cited product page does not document scan export. Keep duplicate decisions and paths separately; hard-link accounting in NullDisk is not duplicate-content detection. | Save the scan for reopening in GrandPerspective, or export text and images. NullDisk does not import GrandPerspective scan files; retain exports and rescan the same location. |
Disk Xray: what stands out
A good fit for Mac users seeking an analyzer plus duplicate and photo cleanup tools.
Disk Xray: strengths
- Size-sorted folder scanner
- Byte-by-byte duplicate checks and similar-picture search
- App uninstaller, disk cleaner, and optional file shredder
Considerations
- Six modules serve different cleanup tasks
- Shredder operations are permanent
- Vendor limits content overwriting to supported HDDs, excluding SSD/APFS/network drives
GrandPerspective: what stands out
A good fit for people who want a free, inspectable treemap and reusable scan records.
GrandPerspective: strengths
- Configurable colors, masks, searches, and scan exclusions
- Quick Look, Finder integration, and file/folder deletion
- Save/reload scans and export text or images
Considerations
- Treemap rather than radial navigation
- Older macOS versions require an older release
- App Store updates can follow SourceForge releases later
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 Disk Xray?
A good fit for Mac users seeking an analyzer plus duplicate and photo cleanup tools. Free App Store download; full functionality via subscription or lifetime purchase. The subscription includes a seven-day trial.
When should I choose GrandPerspective?
A good fit for people who want a free, inspectable treemap and reusable scan records. Free from SourceForge; the same app is $2.99 in the US App Store.
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.