NullDisk our pick
A native macOS disk-space analyzer with an interactive radial map. Native SwiftUI, allocated-size honesty with hard-link dedup, staged Trash-based removal, local disk scans.
DaisyDisk
The sunburst classic: beautiful, fast, beloved — the benchmark everything else is measured against.
Delve
APFS-aware treemap plus sunburst with an honest collector workflow at a tiny price.
GrandPerspective
The free open-source treemap. Ugly? A little. Effective? Completely.
LumaDisk
A modern sunburst with Mac and Windows builds for mixed-OS households.
Disk Inventory X
The revived classic — free treemaps with file-type breakdowns on Apple Silicon.
OmniDiskSweeper
Free largest-first lists from The Omni Group. No map, but zero learning curve.
How we compare
These picks are editorial comparisons of documented features, pricing models, and workflows. We do not claim to have benchmarked every tool on the same Mac or volume. Check each vendor for current prices and availability. This site is published by NullDisk, which also makes a disk analyzer.
Frequently asked questions
Do I even need a disk analyzer on a Mac?
If you've ever wondered where 100 GB went overnight — yes. macOS Storage Management shows categories; analyzers show culprits, down to the file.
Sunburst or treemap?
Sunbursts (DaisyDisk, NullDisk) read like a map and drill beautifully. Treemaps (GrandPerspective) make the single biggest hog scream. Both beat lists — unless you just want the biggest folder fast.
What does NullDisk offer Mac users?
A native SwiftUI app, a radial map, allocated-size measurement with hard-link dedup, and a collector for reviewing removals. Local scan results stay on your Mac; optional purchases process payment and license information separately.