DaisyDisk

DaisyDisk is a Mac disk-space analyser that renders your entire drive as an interactive, colour-coded sunburst wheel, letting you locate and delete storage hogs in seconds.

What is DaisyDisk?

DaisyDisk is a paid macOS utility from Software Ambience Corp. that scans any connected volume — internal SSD, external drives, network shares — and presents the results as a nested radial chart where each wedge represents a folder or file, sized proportionally to what it actually occupies on disk. It is one of the longest-standing tools in the Mac power-user's toolkit, and with good reason: nothing else makes the abstract concept of disk consumption feel this viscerally obvious.

Where a terminal du command buries the answer in thousands of scrolling lines, DaisyDisk turns the same data into something you can read at a glance. Click a wedge, drill deeper, collect files you want to purge into a temporary "collection tray," and delete everything in one final confirmation. The whole operation — scan to empty trash — routinely takes me under three minutes on a 1 TB drive.

What does DaisyDisk do best?

DaisyDisk excels at surfacing large hidden and obscured files that macOS actively hides from Finder. System folders, Time Machine local snapshots, iOS backups stuffed inside Library, Docker image layers, old Xcode simulators — the scanner finds all of it, even when it requires administrator authorisation to peek inside protected directories.

The sunburst visualisation is genuinely beautiful — it belongs in a design portfolio as much as in a utility menu. Colours are assigned by folder so you can track a folder's descendants across every ring without losing orientation. Hover over any segment and a tooltip immediately names the item and its size; click to make it the new centre of the chart. This progressive drill-down is far faster than any tree-view alternative I have used.

• Scan speed — full 1 TB NVMe scan typically completes in well under a minute on Apple Silicon.
• Admin scan — optional elevated mode reveals system and hidden volumes Finder cannot touch.
• Collection tray — stage multiple items from different branches before committing a single delete.
• Multi-volume view — all attached drives visible side-by-side in one window.
• Quick Look integration — spacebar-preview files before deleting them, without ever leaving the app.

How much does DaisyDisk cost?

DaisyDisk is a paid app available directly from the Mac App Store and from the developer's site. There is no subscription — you pay once and own it outright, which feels refreshing in an era where every utility wants a monthly fee. A free trial is available from the developer's website so you can run a full scan and see exactly what you are buying before you commit.

Who should use DaisyDisk?

Any Mac owner who has ever been ambushed by a «Disk Almost Full» notification will get immediate value from DaisyDisk. Developers accumulate build caches, container images, and simulator runtimes at terrifying speed — DaisyDisk makes the cleanup obvious and surgical. Video editors, photographers, and musicians dealing with multi-gigabyte project files will appreciate the ability to see at a glance which project folder is the culprit, without hunting through nested directories.

That said, if your drive is mostly empty or you are comfortable running ncdu in a terminal, DaisyDisk is a luxury rather than a necessity. It is an app you buy once and reach for every few months, not something you run daily — which makes the one-time purchase feel entirely reasonable.

What are the best DaisyDisk alternatives?

The closest rivals are GrandPerspective (free, treemap-style rather than sunburst, less polished but capable), OmniDiskSweeper (free, text-list approach, spartan interface), and Disk Diag (lightweight, more dashboard than explorer). For terminal-comfortable users, ncdu via Homebrew is unbeatable on raw speed. DaisyDisk beats all of them on design, the collection-tray workflow, and the admin scan depth — if those matter to you, nothing else comes close.

How does DaisyDisk compare to GrandPerspective?

GrandPerspective uses a rectangular treemap — each file is a coloured rectangle whose area equals its size. It is thorough and free, but the flat, tile-based layout makes it harder to trace ancestry (which folder does this block belong to?). DaisyDisk's concentric rings keep hierarchical relationships explicit: you always know exactly where you are in the tree. GrandPerspective also lacks the collection tray, so deleting items means switching to Finder. For anyone who cleans disk space more than once a year, DaisyDisk's workflow advantage is worth the cost of entry.