The Best Mac Disk Space Analyzer (Compared)

Your Mac is full and you don’t know why. The 256 GB SSD that felt huge in 2021 is now showing red in System Settings. Time for a disk analyzer — a tool that scans your drive and shows you exactly where the space went, in a format you can actually navigate.

I’ve used every popular Mac disk analyzer over the years. Here’s the honest 2026 ranking, with what each one is actually good at.

What a disk analyzer does (and doesn’t)

A disk analyzer reads your filesystem, sums up sizes, and shows you which folders and files are biggest. That’s it. It doesn’t clean anything automatically. It doesn’t know what’s “safe” to delete. It tells you the truth about your disk and lets you decide.

That’s a different job from a cleaner like Sweep, which curates “this is safe to remove” and shows you a categorized list. Both have their place. If your problem is “I don’t know where my space went,” you want an analyzer. If your problem is “I want to clean routine junk,” you want a cleaner.

The contenders

• DaisyDisk — paid, $9.99 one-time, sunburst chart visualization
• GrandPerspective — free, treemap visualization
• Disk Inventory X — free, treemap, older
• macOS Storage Management — built in, basic
• OmniDiskSweeper — free, list view from The Omni Group

I’ll go through each, then say what I’d actually pick.

Try Sweep yourselfFree download. Decide in 5 minutes whether it’s the cleaner you want. Get Sweep →

DaisyDisk: the pretty paid winner

Price: $9.99 one-time, paid major version upgrades. Visualization: Sunburst chart with concentric rings. Speed: Fastest of the bunch on Apple Silicon.

DaisyDisk is the most polished and the easiest to use. The sunburst chart is beautiful and intuitive — outer rings show deeper folders, hovering shows paths, clicking zooms in.

The drag-to-tray deletion flow is unique and well done. You queue up everything you want gone, review the tray at the bottom, then commit.

If you’re going to pay for one disk analyzer, this is the one. It’s been the best for a decade and remains so in 2026.

Strengths: Beautiful, fast, intuitive. Weaknesses: Costs money. Requires paid upgrades for major versions.

GrandPerspective: the free treemap

Price: Free. Visualization: Treemap (rectangles sized by file size, colored by file type). Speed: Fast on modern Macs.

GrandPerspective is the free alternative most often recommended. Treemaps are functional but less intuitive than sunbursts — a 4 GB file looks the same shape as ten 400 MB files in the same folder. You have to click around to navigate.

The interface is minimal and dated, but it works. There’s no upsell, no nag, no telemetry. The developer maintains it as donationware.

Strengths: Free, fast, no nonsense. Weaknesses: Visualization is less intuitive than DaisyDisk’s. UI is dated.

Disk Inventory X: the veteran

Price: Free. Visualization: Treemap, similar to GrandPerspective. Speed: Slow on modern drives compared to the others.

Disk Inventory X is the older sibling of GrandPerspective. It works, and it’s free, but development has been slow. On modern Apple Silicon Macs, it’s notably slower to scan than GrandPerspective or DaisyDisk.

If you found this app first and like it, fine. There’s no real reason to choose it over GrandPerspective in 2026.

Strengths: Free. Weaknesses: Slower, less actively maintained.

macOS Storage Management: the built-in option

Price: Free, comes with macOS. Visualization: Categorized horizontal bar with drill-down lists. Speed: Instant.

System Settings → General → Storage shows a colored bar with categories (Apps, Documents, System, macOS, Other) and lets you drill into Documents, iOS Files, and a few others to find big files.

It’s the right starting point for casual users. If you can solve your problem here (“oh, I have 80 GB of GoPro footage in Movies”), you don’t need a third-party analyzer.

Strengths: Free, built in, sufficient for casual use. Weaknesses: Can’t navigate deep nested folders. No visualization. Won’t see hidden system folders well.

OmniDiskSweeper: the no-frills option

Price: Free. Visualization: None — sortable list view. Speed: Fast.

OmniDiskSweeper from The Omni Group is a list-based analyzer. No charts, no treemaps, just a sortable column showing folders and their total sizes. You navigate down through folders the way you would in Finder.

For users who hate visual chart UIs and just want sortable numbers, it’s clean and effective. Free.

Strengths: Free, fast, made by a respected studio. Weaknesses: No visualization, list view only.

How they compare

The “should I buy DaisyDisk” question

For a Mac user who deals with disk space issues regularly, $9.99 is trivial. DaisyDisk pays for itself the first time you use it because the visualization makes you faster.

For someone who fills their disk once every few years, the built-in Storage Management plus GrandPerspective covers it. No need to spend money.

Where Sweep fits

Sweep isn’t a disk analyzer. It’s a cleaner. The job is different: Sweep curates “here are caches, logs, language files, and downloads safe to remove” rather than “here’s a chart of your whole disk.”

The two tools work well together. Use DaisyDisk (or any analyzer) when you want to see where space went and find specific big files. Use Sweep for routine cache and language file cleanup, app uninstall, and privacy auditing.

Want a calmer cleaner?Sweep does the cleaning without the upsell carousel. Try Sweep free →

Common big-file culprits

Before you even open an analyzer, here are the usual suspects on a full Mac. Knowing this might save you the scan:

• Time Machine local snapshots. macOS keeps recent backups locally even if your external drive isn’t connected. They auto-clear when space is needed but can hog space temporarily.
• iOS device backups. ~/Library/Application Support/MobileSync/Backup can hold gigabytes of old iPhone backups.
• Final Cut Pro and Logic libraries. Project files with embedded media. A single Logic project can be 5+ GB.
• iMovie working files. ~/Movies/iMovie Library.imovielibrary grows over time.
• Photos library. If you have iCloud Photos with “Download Originals” on, your full library lives locally.
• Xcode DerivedData. ~/Library/Developer/Xcode/DerivedData can be 20+ GB on dev machines.
• Adobe Creative Cloud cache. ~/Library/Caches/Adobe can balloon.
• Steam library. ~/Library/Application Support/Steam/steamapps if you game.
• Downloads folder. Look at your Downloads folder. Just look.

A lot of “where’s my space?” problems are answered by a glance at those locations.

Bottom line

Get DaisyDisk if you want the best. $9.99 is a fair price for a tool you’ll keep using.

Get GrandPerspective if you want free and a visualization.

Use macOS Storage Management for casual checks. It’s already there.

Skip Disk Inventory X. GrandPerspective does it better in 2026.

Pair with a cleaner like Sweep for the routine maintenance side. Different jobs, both worth having.

See what Sweep finds on your MacFree scan, no credit card. Decide if it’s worth keeping after. Download Sweep →