01 There is no TreeSize for macOS
TreeSize is a Windows application from JAM Software, and it has been
Windows-only for its entire life. The company's support pages answer
the question directly: their products run on Windows, and there is no
Mac version. Anything you find advertised as "TreeSize for Mac" on a
download aggregator is either a listing error or a repackaged
installer you should not run.
The reason is the same one that keeps
WizTree on Windows. TreeSize
leans on NTFS internals for its speed and on the Windows shell for its
context menus, its file-server scanning, and its NTFS permissions
reporting. None of that has a direct counterpart on macOS. A Mac tool
has to be built for APFS from the start, which is what we did.
02 Delve is the closest native equivalent
Delve does the part of TreeSize that most people actually use: point
it at a volume, get a map of the whole thing in seconds, and the
folders costing you real space are the big rectangles. Where TreeSize
reads the NTFS Master File Table, Delve uses
getattrlistbulk to pull a whole directory's worth of file
metadata per system call instead of one entry at a time, which is the
fast path macOS actually gives you. A 1 TB volume with a few
million files finishes in well under two minutes on a base M2,
and the treemap is drawn on the GPU so it stays smooth at 60 Hz
while you drill into it.
One thing Delve does that TreeSize has no reason to: it counts APFS
clones, hardlinks, and iCloud dataless files honestly. On a Mac, the
logical size of a folder and the bytes you get back by deleting it are
routinely different numbers. Delve shows you the second one. We wrote
up why in Counting bytes on APFS.
| |
Delve (Mac) |
TreeSize (Windows) |
| Platform |
macOS 26, Apple Silicon |
Windows only |
| Visualization |
Treemap + file list |
Tree list, treemap in paid tiers |
| Scan speed |
Fast (bulk metadata calls) |
Fast (reads NTFS MFT) |
| Rendering |
GPU, 60 Hz |
CPU-drawn |
| APFS clone & hardlink accounting |
Yes |
N/A (Windows) |
| Network share & server scanning |
Local volumes only |
Yes, in Professional |
| Scheduled scans & exports |
No |
Yes, in Professional |
| Native OS integration |
Quick Look, drag-to-scan, Trash-safe deletes |
Windows shell context menu |
| Price |
$4.99 once (14-day trial) |
Free edition, paid Personal and Professional tiers |
03 Where TreeSize genuinely wins
We are not going to pretend Delve replaces TreeSize Professional. If
you came here because you administer a Windows file server and someone
handed you a Mac, the honest answer is that Delve does not do what you
need. TreeSize Professional scans network shares and servers, reports
NTFS permissions, schedules recurring scans, and exports to Excel and
HTML. Delve is a single-user desktop tool for local volumes. It has no
scheduler, no export, and no server story.
What Delve is good at is the everyday question: this Mac is full, what
is on it, and what can safely go. If that is why you used TreeSize, you
will feel at home. If it is not, we would rather you knew now.
04 Other Mac options
Delve is not the only choice and we would rather point you somewhere
useful. GrandPerspective is
a free, open-source Mac treemap that still gets updates and runs on
older and Intel Macs, which Delve does not.
OmniDiskSweeper is free and
gives you a sorted list of your biggest folders with no picture at all,
which is sometimes exactly right.
DaisyDisk is a polished $9.99
sunburst, though deletion is behind its paywall. Our
full roundup lays
all four out side by side.
The honest take
Coming from TreeSize on Windows, what you want on a Mac is a fast
scan, a clear picture, and deletes you can trust. Delve does that
natively on Apple Silicon for $4.99 once, with a 14-day free trial
and honest APFS math that Windows tools never had to think about.
If you need TreeSize Professional's server scanning and scheduled
reports, no Mac tool we know of fills that gap, Delve included.
And on an older or Intel Mac, GrandPerspective is the free treemap
that will actually run.