Which fits your needs?
DissectMac: People who want free inspection and optional paid app/leftover cleanup.
SpacePeek: Finder users who want to inspect archives before extracting or deleting them.
Features, pricing, and workflow
Scroll across to compare
| Feature | DissectMac | SpacePeek |
|---|---|---|
| Best fit | People who want free inspection and optional paid app/leftover cleanup. | Finder users who want to inspect archives before extracting or deleting them. |
| Visualization | Treemap and search | Finder Quick Look folder/archive browser and size overview |
| Platforms and requirements | macOS (Intel and Apple Silicon builds) | macOS 14+ |
| Pricing and editions | Map, search, and monitor are free; Pro is listed at $12.99 once plus tax. | Free previews; optional $3.99 one-time Pro purchase in the US App Store. |
| Open source | No | No |
| Native macOS UI | Yes | Yes |
| Cleanup workflow | Pro moves selected files and app leftovers to Trash after review. | Inspection and copying; use Finder or a separate cleanup tool for removals. |
| Reports and portability | The overview does not establish scan-report export. Preserve any app-removal decisions and rescan the same folders in NullDisk. | SpacePeek previews existing folders and archives. Keep original archives and important paths; moving to NullDisk does not transfer Quick Look extension features. |
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
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 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 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.