Which fits your needs?
Disk Inventory X: Users interested in the classic treemap or its community successors.
SpacePeek: Finder users who want to inspect archives before extracting or deleting them.
Features, pricing, and workflow
Scroll across to compare
| Feature | Disk Inventory X | SpacePeek |
|---|---|---|
| Best fit | Users interested in the classic treemap or its community successors. | Finder users who want to inspect archives before extracting or deleting them. |
| Visualization | Treemap; features depend on X, Xs, or Y | Finder Quick Look folder/archive browser and size overview |
| Platforms and requirements | Original X 1.3: macOS 10.13–10.15; Xs/Y requirements differ | macOS 14+ |
| Pricing and editions | Original X is free under the GPL; Xs and Y are independent community projects. | Free previews; optional $3.99 one-time Pro purchase in the US App Store. |
| Open source | Yes | No |
| Native macOS UI | Yes | Yes |
| Cleanup workflow | Check the selected project’s manual; X, Xs, and Y do not share a guaranteed cleanup contract. | Inspection and copying; use Finder or a separate cleanup tool for removals. |
| Reports and portability | Check export support in the exact X, Xs, or Y build. Retain its scan records separately; no direct import into NullDisk is documented. | SpacePeek previews existing folders and archives. Keep original archives and important paths; moving to NullDisk does not transfer Quick Look extension features. |
Disk Inventory X: what stands out
A good fit for users interested in the classic treemap or its community successors.
Disk Inventory X: strengths
- Treemap visualization of disk usage
- Xs updates the original codebase for Apple Silicon
- Y is a separate Swift/SwiftUI rewrite
Considerations
- The original X, revival Xs, and rewrite Y are different apps
- Compatibility and features depend on the chosen build
- Check each project’s current release and signing instructions
SpacePeek: what stands out
A good fit for Finder users who want to inspect archives before extracting or deleting them.
SpacePeek: strengths
- Preview and search folders plus ZIP, 7z, and RAR archives
- Folder-size overview without background indexing
- Pro adds deeper navigation and copying archive members
Considerations
- An inspection companion rather than a full-drive cleanup utility
- Free browsing stops after the first child level
- Pro archive copying is limited to 100 MiB per file
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 Inventory X?
A good fit for users interested in the classic treemap or its community successors. Original X is free under the GPL; Xs and Y are independent community projects.
When should I choose SpacePeek?
A good fit for Finder users who want to inspect archives before extracting or deleting them. Free previews; optional $3.99 one-time Pro purchase 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.