Start with the job: a visual storage map, a ranked browser, saved reports, duplicates, or remote storage. These tools make different tradeoffs; there is no universal winner.
NullDisk fits if you want a native Mac GUI with radial and treemap views, SSH/cloud sources, and Git-aware development cleanup. Its separate CLI adds terminal maps and JSON/NDJSON reports. All direct Mac features are free with reminders; the app sends anonymous usage telemetry.
Price
Direct Mac edition free with reminders; optional $9.99 one-time personal license or team seat removes reminders. App Store terms are separate.
Platform
Mac app: macOS 14+; CLI: macOS, Linux, Windows
Consider
Desktop GUI requires macOS 14+; Linux/Windows use the separate CLI
Selections compare documented features and the job described in this guide. We did not run a common benchmark, assign performance scores, or audit every app’s code. Official sources appear under “Sources and how we compare.” Requirements and prices can change.
Common questions
Do I need a third-party analyzer?
Start with macOS Storage settings and Finder for a simple cleanup. An analyzer helps when you need folder-level detail, a visual map, or a repeatable reporting workflow.
Which chart is best?
A sunburst emphasizes folder depth; a treemap emphasizes relative area; a list is convenient for exact sizes. NullDisk, Delve, and LumaDisk offer both map styles. Choose the view you can navigate confidently.
Why do reported totals differ?
Compare the same scope and size mode. Permissions, logical versus allocated bytes, hard links, APFS shared blocks, snapshots, and cloud placeholders all affect interpretation.