TreeSize for Mac: what to use instead, free and paid

Written by the maker of Strata, which is one of the tools below. Facts about TreeSize and the other tools come from their own websites, checked on 10 October 2026; each links to its source.

Is there a TreeSize for Mac?

No. Every edition of TreeSize runs on Windows, and JAM Software, which makes it, answers the Mac question in its knowledge base: "our products can be run on Windows systems only", and it does not yet provide a Mac version.

TreeSize comes in three editions. TreeSize Free is for private, non-commercial use on Windows desktops. Personal costs €20.40 per user a year, or €40 once with a year of updates, and Professional from €41 per user a year, each with a 14-day trial. None of them installs on a Mac.

One thing causes confusion. The Mac App Store has an app called TreeSize - Disk Usage, and it is not JAM's TreeSize: its developer is listed as woojooin, it costs $3.99 in the US store, and it has been there since 2013, with version 2.83 released on 12 September 2026. Judge it as an app in its own right, not as a Mac edition of the Windows program.

TreeSize's features, and their Mac equivalents

What you should use instead depends on which part of TreeSize you relied on. The free edition is a folder tree with sizes, a treemap and PDF reports; the paid ones add analysis, exports and reach. Here is where each part lives on a Mac.

TreeSize feature	From edition	On a Mac
Folder tree with sizes, down to single files	Free	Finder's List view with Calculate all sizes; OmniDiskSweeper; QDirStat; Strata's List and Columns views, which show a folder's files smaller than about 1 MB as one row
Treemap chart	Free	GrandPerspective; QDirStat; WizTreeMac; Strata's Detailed Map
PDF reports	Free	GrandPerspective saves the map as an image or the data as text; Strata Pro's Report saves a spreadsheet or a web page
Excel, CSV and HTML exports	Personal	WizTreeMac's CSV export; Strata Pro's Report, as CSV or HTML
Largest files	Personal	Strata's Large Files; WizTreeMac's file list
Duplicate search	Personal	Strata Pro's Duplicates, by contents; WizTreeMac, by name, size and date
Disk usage over time	Personal	Strata Pro's Report, Changes Over Time
Scheduled scans and alerts	Professional	No scheduled scans in the tools here; Strata warns when the startup disk falls under a share of free space you choose, from 2% to 20%, while it is open in its window or the menu bar
Server shares	Professional (Personal on a home network)	Mount the share in Finder, and the Mac apps here size it like any other drive
SharePoint, Amazon S3, Linux over SSH	Professional (Personal on a home network)	No Mac app here does this; TreeSize itself can scan a Mac (below)

The free alternatives

For every Mac disk tool side by side, see our comparison of disk space analyzers for Mac. These are the ones that map best onto TreeSize.

Finder: Calculate all sizes

The Mac already does the core of TreeSize Free, if you ask. Finder leaves folder sizes blank in List view by default, because adding them up takes time. To turn them on:

1. Open the folder you want to measure, and choose View, then as List.
2. Choose View, then Show View Options.
3. Tick Calculate all sizes. To use it for every folder in List view, click Use as Defaults.
4. Click the Size column header to sort, biggest first.

It is a list, not a tree with bars, and on a whole disk it is slow. For an overview by category, System Settings has one: choose General, then Storage, where the More Info button beside a category such as Documents opens more detail and ways to manage it.

OmniDiskSweeper: the whole drive, largest first

OmniDiskSweeper, a free download from The Omni Group, is the closest thing on a Mac to TreeSize Free's main window: everything on a drive, largest to smallest, with the Trash a click away. Its current release, 1.16, supports macOS 11 to 26; for macOS 27, Omni offers a 1.17 test build. Our OmniDiskSweeper guide covers the tools like it.

QDirStat: TreeSize Free's two panes

QDirStat is the nearest thing to TreeSize Free's tree and chart: folders with their sizes, and a coloured treemap of the same data. Open source under the GPL and free, it ships as notarized Mac builds, signed off by Apple's malware check, and Homebrew installs it with brew install --cask qdirstat on macOS 13 and later.

GrandPerspective: the chart on its own

If the treemap was the part of TreeSize you used, GrandPerspective draws that and little else, and can save the map as an image or the data as text. Download it free from SourceForge, or pay $2.99 for the identical Mac App Store copy. Version 3.8.1 runs on macOS 14 and later, and 3.7.2 on macOS 11 to 13.

WizTreeMac: free for personal use

WizTree, another favourite Windows disk tool, has had a Mac version since 16 September 2026. WizTreeMac has a tree, a treemap, a list of the largest files, a duplicate finder that matches by name, size and date, and CSV export. It is free for personal use and needs macOS 12 or later. Our WizTree for Mac guide covers what differs from Windows.

In Terminal: du and ncdu

Every Mac has du: du -sh * in a folder prints the size of each item in it, except hidden ones, whose names start with a dot. For something closer to TreeSize, ncdu, from Homebrew, browses a disk by size with the keyboard.

The paid alternatives

Strata: TreeSize Personal's analysis, with cleanup

Strata is ours, so weigh this accordingly. It covers the parts of the paid editions most people with one Mac use: largest files, duplicates, changes over time and exports. It has nothing for Professional's scheduled scans, command line, or server and cloud scanning.

• Free: the whole disk or any folder as a list or in columns, folders by size; a Detailed Map treemap; File Types; Search and Large Files; and almost-full notices, more often as the disk fills, at a share of free space you choose in Settings, while Strata is open.
• Strata Pro: Duplicates, which compares contents rather than names; Report, with Changes Over Time and exports as a spreadsheet or a web page; junk, hidden files and app leftovers; an uninstaller; and removing anything at all, which TreeSize Free does for nothing.

Everything it removes goes to the Trash, with Put Back. Strata Pro is $9.99 once, not a subscription, and one licence covers every Mac you personally own. It needs macOS 13 or later.

DaisyDisk: TreeSize's charts, not its tools

DaisyDisk replaces the picture rather than the toolkit: it draws the disk as rings you click into, and its site lists no duplicate search. A $9.99 licence, paid once, covers up to five personal Macs on macOS 10.13 or later. Before you delete with it, know that its user guide says it "permanently removes files and folders instead of moving them to the system Trash".

Scanning a Mac with TreeSize, from Windows

If you look after Macs from a Windows PC, TreeSize can reach them in the two ways JAM's knowledge base names: "through SSH or by using a Samba server".

• Over SSH, with TreeSize Professional (or Personal, on a home network). Its feature list includes scanning Linux machines via SSH, and its version 9.2 added support for zsh, the Mac's default shell, and for GNU coreutils installed with a prefix, which its changelog says "can significantly simplify the analysis of MacOS systems."
• What the Mac needs for SSH. Turn on Remote Login: System Settings, General, Sharing, then the Info button beside Remote Login. Allow full disk access for remote users there decides whether an SSH session can read the folders macOS protects, and Allow access for limits who can log in. Homebrew's coreutils installs the commands that clash with the Mac's own with a g prefix, which is that kind of prefixed installation.
• Over SMB, with Professional in an office (Free and Personal are for home use only). Turn on File Sharing with SMB on the Mac, and TreeSize sizes the shared folders like any network drive. It sees only what is shared, and only what the account it connects with can read.

This is a job for an IT department with Windows PCs and a few Macs. For someone with one Mac, any app above is simpler.

Side by side

Tool	Shows	Price	Needs	Duplicates	Deleting
Finder	Folder sizes in List view	Built in	Any Mac	No	Trash, or immediately with Option
OmniDiskSweeper	Everything, largest first	Free	macOS 11 to 26; a test build for 27	No	Trash, or permanent with Option
QDirStat	Tree, treemap	Free	macOS 13	No	Trash, or a permanent delete
GrandPerspective	Treemap	Free, or $2.99 on the App Store	macOS 14 (11 with 3.7.2)	No	Trash, off by default
WizTreeMac	Tree, treemap, file list	Free for personal use	macOS 12	By name, size and date	Not documented
DaisyDisk	Rings	$9.99 once	macOS 10.13	No	Permanent
Strata	List, columns, cards, treemap, file types, large files	Free to scan; $9.99 once to remove	macOS 13	By contents	Trash, with Put Back

Coming from TreeSize: three adjustments

Administrator rights count for less. On Windows, the usual answer to a folder a disk tool cannot read is to run it as administrator. On a Mac the gate is a privacy setting: an app needs Full Disk Access, in System Settings, Privacy & Security, to see other apps' data such as Mail and Messages. Finder has that access built in; the disk apps above have to be given it, and Terminal needs it before du or ncdu can see everything.

Sizes can overlap. APFS, the Mac's file system, lets copies made with Finder's Duplicate share storage, so a folder's total can be more than it costs the disk. Our guide to finding large files explains which number to trust.

The Recycle Bin is the Trash, mostly. In Finder, Command Delete sends a file to the Trash, while Option Command Delete removes it on the spot. Disk tools differ, as the Deleting column above shows.

Which should you use?

Frequently asked questions