Largest files first
Pick a drive and the scan lists folders from biggest to smallest. You see where space went in seconds, not after a guessing game in Finder.
Free Mac disk cleaner / v1.16
OmniDiskSweeper for MacFind What Fills Your Disk
A free app from The Omni Group that lists every file and folder on your drive from largest to smallest. Spot the space hog, sweep it into the Trash and get your gigabytes back.
$0Free forever, no upsells
4.8★From 262 user ratings
2001First released by Omni
14+Minimum macOS version
Everything OmniDiskSweeper Does
OmniDiskSweeper does one job well. It scans a drive and sorts every item by size, so the biggest space hogs sit right at the top. No charts to decode and no cleaning presets to trust blindly.
Finder-style columns
Click a folder and its contents open in the next column, already sorted by size. Drill from Macintosh HD down to one stray file in a few clicks.
Color-coded sizes
Sizes carry color, so gigabyte giants jump off the list while small stuff fades back. Your eye lands on the problem before you read a number.
Any drive you plug in
Scan your internal SSD, an external disk or a mounted network volume. Each one gets the same size-sorted view as your startup drive.
Open or Trash in one click
Found something odd? Open it to check what it is, then send it to the Trash straight from the list. No hunting for the file in Finder afterwards.
Safe by design
Swept items land in the Trash first, so nothing vanishes by accident. It warns you before touching files macOS relies on. Hold ⌥ only when you truly want a permanent delete.
Terminal installation
Advanced users can install OmniDiskSweeper for Mac with a single Homebrew command.
brew install --cask omnidisksweeper
How to open Terminal on Mac
- Press ⌘ + Space to bring up Spotlight.
- Type Terminal in the search bar.
- Hit Return and a Terminal window opens.
Installation via Terminal command
- Click Copy above to grab the command.
- Paste it into Terminal with ⌘ + V.
- Press Return. OmniDiskSweeper lands in Applications.
No Homebrew? Install it from brew.sh, or grab the official DMG from The Omni Group.
Download DMGHow OmniDiskSweeper Works
Three clicks from "disk almost full" to a clean drive.
Pick a drive
Open the app and choose Macintosh HD, an external disk or a network share. Hit Sweep and the scan starts right away.
Follow the biggest folder
The top row is always the heaviest. Click it, then click the top row again in the next column until you hit the real culprit.
Sweep it to the Trash
Select what you no longer need and press Trash. Check it once more, then empty the Trash to reclaim the space for good.
Follow the Heaviest Row Down
Here's the trick long-time OmniDiskSweeper users swear by. Always click the top item. Since every column sorts by size, the path to your biggest waste reveals itself.
Try it on this example scan. Click any folder and watch the next column resort.
Pro tip: Trash is the safe default. Hold ⌥ Option while deleting only when you want a file gone for good with no undo.
Example scan / Macintosh HD494 GB
Macintosh HD
OmniDiskSweeper vs Other Ways to Free Space
macOS Storage settings show categories. Omni Disk Sweeper shows the exact folder behind them.
| What you need | OmniDiskSweeper | macOS Storage settings | Manual Finder search |
|---|---|---|---|
| Every folder sorted by size | ✓ Whole drive | ✕ Category totals | ✕ One folder at a time |
| Drill into any folder | ✓ Column view | Limited lists | ✓ Slow |
| External and network drives | ✓ Yes | ✕ No | ✓ Yes |
| Trash straight from results | ✓ One click | Some items | ✓ Manual |
| Warns about system files | ✓ Yes | Hides them | ✕ No |
| Price | $0 | $0 | $0 |
What Mac Users Say About OmniDiskSweeper
Real cleanups from people who ran out of space and found the reason fast.
My 256 GB MacBook Air kept flashing the disk full warning. OmniDiskSweeper showed 38 GB of old iPhone backups in ten seconds. Gone that afternoon.
Priya S.
Omni Disk Sweeper has lived in my Applications folder for over a decade. It lists folders by size and lets me Trash the fat. Nothing fancy and that's exactly why I keep it.
Tom H.
Searched "swipe cleaner disk mac" at 1 AM with a full drive and landed here. Found a 22 GB Final Cut cache I forgot existed. No subscription and no upsell.
Lena K.
Does one job and does it well. I'd love a chart view someday, but the size-sorted columns get me to the problem folder faster than any treemap.
Marco D.
The Trash-first default saved me once. I swept a folder I still needed, dragged it back out and carried on. Small detail, big relief.
Hannah B.
I install OmniDiskSweeper for Mac on every machine I set up for clients. Free, tiny and made by The Omni Group. Easy recommendation.
Omar F.
Xcode DerivedData and old simulators were sitting at 60 GB. The column view made it obvious in a single scan.
Jake R.
Works on my NAS share too. I scanned the network volume and found duplicate photo exports from three years ago.
Sofia M.
Installed it with one brew command. Clicked Macintosh HD and the answer sat right at the top of the list.
Chris P.
OmniDiskSweeper FAQ
Straight answers before you download.
Is OmniDiskSweeper completely free?
Yes. OmniDiskSweeper costs nothing. The Omni Group made it freeware in 2009, so every feature works without a license, account or trial timer.
What macOS version does OmniDiskSweeper require?
Version 1.16 runs on macOS 14 Sonoma and later. Older Macs can pick an earlier build from The Omni Group's archive, with versions going back to Mac OS X 10.4.
Is OmniDiskSweeper safe to use?
Yes. Anything you sweep goes to the Trash by default, so you can still restore it. The app also warns you before you touch files that macOS or Installer-based apps depend on.
How do I install OmniDiskSweeper via Terminal?
Run brew install --cask omnidisksweeper in Terminal. Homebrew downloads the app and places it in your Applications folder. You can also download the DMG from The Omni Group.
Does OmniDiskSweeper support Apple Silicon Macs?
Yes. OmniDiskSweeper runs natively on Apple Silicon Macs from M1 onward and on Intel Macs.
Can OmniDiskSweeper scan external and network drives?
Yes. Pick any internal disk, external drive or mounted network volume from the drive list. It sorts that drive by size exactly like your startup disk.
Why does macOS ask for folder access when OmniDiskSweeper scans?
macOS shows a privacy prompt whenever an app reads folders like Desktop or Documents. OmniDiskSweeper only reads file sizes to build its list. It never opens the files it scans.
Is this the official OmniDiskSweeper website?
No. omnidisksweeper.app is an independent guide. OmniDiskSweeper belongs to The Omni Group and every download button here points to their official servers.
Get Your Disk Space Back Today
Download OmniDiskSweeper, scan once and see exactly what fills your Mac.