OmniDiskSweeper alternatives, and when the plain list still wins

Most people arrive here because the OmniDiskSweeper page is confusing. It lists older versions for macOS 10.4 through 10.13 and names no current version, no price and no system requirement, which reads like a tool that was abandoned a decade ago. It is not. The download button on that page hands over a build from last year.

How to check the download yourself

You do not have to take the paragraph above on trust. This follows the redirect and prints the file it lands on, which is where the version number comes from:

curl -sIL -o /dev/null -w '%{url_effective}\n' \
  https://www.omnigroup.com/download/latest/OmniDiskSweeper

If the filename it prints is newer than 1.16, the tool has been updated since this page was written and the rest of this comparison still holds. Once it is installed, Get Info on the app in Finder tells you whether it is Universal or Intel, which is the answer to the Apple silicon question that Omni's page does not give.

What the sorted list is genuinely better at

A treemap and a sorted list answer different questions, and the list wins more often than the screenshots suggest.

• It shows numbers, not areas. A rectangle tells you something is big. A column of sizes tells you it is 6.3 GB, which is the number you need before deciding whether it is worth the risk of deleting.
• It drills down in one direction. Open the biggest folder, look at the biggest thing inside it, repeat. That is the whole interaction, and it is hard to get lost in.
• It is small and starts fast. Under 10 MB, and there is nothing to configure.
• Nothing is interpreted for you. It reports what is on disk. No recommendations, no scores, no offer to speed up your Mac.

The same job from the terminal, in one line

This is worth saying plainly, including against our own product: the core of what any of these tools do is one command that ships with macOS. It prints the largest things in your home folder, biggest last.

du -xh -d 1 ~ 2>/dev/null | sort -h | tail -20

Change the path to walk further down, for example du -xh -d 1 ~/Library once the first run points at Library. The -x keeps it on one volume so it does not wander into mounted disks, and the redirect hides the permission errors macOS raises for folders no app can read without Full Disk Access. Those permission blocks apply to every tool on this page, which is why a scan sometimes misses a folder you know is large until you grant access in System Settings.

Where any pure size list stops

These are not defects in OmniDiskSweeper. They are the boundary of what a size list can know, and they are the reason people end up with a second tool.

The first row is the common one. A size list will show you a large folder in Application Support and cannot tell you the app that made it was uninstalled two years ago. That is a separate problem, and it is where a surprising amount of reclaimable space sits.

Which alternative fits which problem

If the sorted list is what you liked and you only want it maintained, GrandPerspective is the closest free tool that is still actively released, and DaisyDisk is the paid one worth the money. Neither is an upgrade on OmniDiskSweeper for the one job of finding the single biggest file.

Where Free Mac differs, and where it does not

It maps the same drive and reads the same numbers. What it adds is meaning: applications totalled with the folders they left around the system, and developer output grouped by project rather than by path. The honest trade is that the scan and the map are free and unlimited, and exact sizes, opening a folder and removing anything need a key at $19.99 every six months. If all you need is the biggest file on the disk, the command above costs nothing and OmniDiskSweeper is a nicer way to run it.