MHN Disk

See where yourMac's space went

MHN Disk scans a disk or folder and draws it as rings and a treemap, so the big things are obvious. Collect what you can lose and move it to the Trash in one checked step.

Download for Mac

Version 1.0 · 2.7 MB · macOS 15 or later

Scanning disk.metahuman.network
Rings of this website's own files

Questions

Two maps of the same disk

Rings show where it went

Folders fan out from the middle, so the one that's quietly huge stands out. Scan a whole disk and a grey arc shows the space no scan can see: snapshots, purgeable files, other volumes.

Blocks show how big

The cushion treemap gives every file a tile in proportion to its size, shaded so each folder reads as one raised block. ⌘↓ zooms into a folder and ⌘↑ steps back out.

Colour shows what it is

Colour by folder, by kind or by extension. Pick a type under File Types and every file of it lights up in both maps, here every .mov in a home folder.

MHN Disk's rings for a whole Macintosh HD: Users takes most of the circle, and a grey arc marks 112 GB of hidden space. The cushion treemap of a home folder: Library, Pictures and Movies as large blocks of shaded tiles, with a Final Cut library selected. The treemap coloured by extension with .mov highlighted: the Movies folder lights up blue, and the inspector shows it at 86 GB.

Type a name, see what it weighs

    Filter by Name in MHN Disk, on a sample Mac.

    Every command has a shortcut

    • Scan Folder…⌘O

      Scan a whole disk or any folder with live progress. It stays on one volume, looks inside app bundles and counts hard links once.

    • Uninstall App…⇧⌘U

      Finds what an app left in your Library (preferences, caches, containers, launch agents, privileged helpers) and sends it to the Trash with the app.

    • Startup Items⇧⌘L

      Apps that open at login, launch agents and daemons, and helpers inside apps. Turn them off, remove them, and spot the ones whose app is gone.

    • Add to Collector⌘⌫

      Gather big items as you find them and watch the total grow. Nothing moves until you say so.

    • Move to Trash…⌥⌘⌫

      Always asks first, with every item and the total. Things stay in the Trash until you empty it.

    • Quick Look⌘Y

      Preview the selected file without leaving the map. The preview follows the selection.

    • Rescan This Folder⇧⌘R

      Refresh one folder in place after you've tidied it, without scanning the whole disk again.

    • Reveal in Finder⌥⌘R

      Opens a Finder window with the item selected.

    First, scan a disk or a folder

    Pick a disk or any folder. MHN Disk stays on one volume, looks inside app bundles and counts hard links once, so the totals are right.

    MHN Disk scanning Macintosh HD: 1,482,906 files and 517.4 GB found so far, with the rings drawing themselves as it goes. The rings of a home folder with DerivedData selected: 38 GB, 73% of the Xcode folder. The Collector bar holding DerivedData, iOS DeviceSupport and an iPhone backup: 117 GB to free. The confirmation: Move 4 items to the Trash? It lists each item and a total of 117 GB.

    Leftovers
    and login items

    Download for Mac

    Lumen Studio and the 7 things it left in your Library: 2.6 GB.

    • 412 MBLumen Studio.app/ApplicationsThe app
    • 1.2 GBstudio.lumen.LumenStudio~/Library/CachesCaches
    • 640 MBLumen Studio~/Library/Application SupportSupport files
    • 310 MBstudio.lumen.LumenStudio~/Library/ContainersContainer
    • 1.1 MBstudio.lumen.helper/Library/PrivilegedHelperToolsPrivileged helper
    • 88 KBstudio.lumen.LumenStudio.savedState~/Library/Saved Application StateWindow state
    • 4 KBstudio.lumen.LumenStudio.plist~/Library/PreferencesPreferences
    • 4 KBstudio.lumen.updater.plist~/Library/LaunchAgentsLaunch agent

    Tick what goes; it joins the app in the Collector. Items owned by the system move after one administrator password.

    6 items start on their own. 2 were left behind by apps that are gone.

    • OnLumen Studio/Applications/Lumen Studio.appOpens at login
    • App missingOld Sync/Applications/Old Sync.appOpens at login
    • Loadedstudio.lumen.updater~/Library/LaunchAgentsYour account
    • Program missingcom.gone.helper~/Library/LaunchAgentsYour account
    • Offcom.vendor.menuextra/Library/LaunchAgentsAll users
    • Loadedcom.vendor.helperd/Library/LaunchDaemonsRuns as root

    Turn a job off and on, or remove it. Jobs for every user or for the system ask for your password first.

    MHN Disk Helper lives in the menu bar and starts at login once you turn it on.

    • TrashOffers to remove leftoverswhen you drag an app to the TrashAutomatic
    • ⇧⌘UUninstall App…the full uninstaller, from the menu barMenu
    • ⇧⌘LStartup Items…what runs at login, from the menu barMenu
    • AppOpen or quit MHN Diskwithout hunting for its windowMenu
    • AccessFull Disk Access settingsthe helper needs its own to see the TrashShortcut

    Turn it on in Settings or on the home screen; turn it off the same way.

    Good questions

    • Without it, macOS hides Mail, Messages, Safari, other apps' containers and some system folders, so a scan under-counts. Turn on MHN Disk in System Settings › Privacy & Security › Full Disk Access, then scan again. The home screen tells you when it's off.

    • No. Everything goes through one confirmation that lists each item and the total, and it goes to the Trash rather than off the disk, so you can put things back until you empty it.

    • On a whole-disk scan, the space macOS reports as used that no scan can see: local snapshots, purgeable caches, other APFS volumes and folders it couldn't read. MHN Disk draws it as its own grey arc, so the rings add up to the disk.

    • App Store apps run in a sandbox that can't read the whole disk, and a disk scanner has to. MHN Disk is signed with our Developer ID and notarized by Apple instead, so macOS checks it before it first opens.

    • No. MHN Disk doesn't connect to the internet at all: no account, no analytics, no update check. What it scans stays on your Mac.

    • macOS 15 or later, on Apple silicon and Intel Macs. Open the 2.7 MB disk image and drag MHN Disk to Applications.

    The IBM 350 disk unit in a museum case: a tall drum of fifty thin metal platters with the access arm and its wiring on the left.
    The IBM 350 disk unit, 1956: fifty platters on one spindle.

    The first hard disk held 3.75 MB

    IBM's 350 disk unit shipped in 1956 with fifty 24-inch platters on one spindle. The MHN Disk download is 2.7 MB. It would have fit, with room to spare.

    A single orange-brown RAMAC platter, 24 inches across, lying on a wooden table.
    One of its 24-inch platters.
    The read head of a 2004 hard disk, seeking.

    Get your
    disk back

    Download the disk image, drag MHN Disk to Applications and turn on Full Disk Access. Then scan.

    MHN Disk

    Version 1.0 (5)

    Size
    2.7 MB disk image
    Requires
    macOS 15 or later
    Runs on
    Apple silicon and Intel
    Signed by
    Metahuman Network LLC
    Checked by
    Apple notarization
    SHA-256
    3c650057db9c7224f03113c8ff28cbbfec1481dee6a5f062cdf51f86430949e8
    Download MHN Disk