Features
One scan answers every question on this page. Each feature reads the same measurement of your disk, so the figures agree with each other — and with what macOS reports.
Most people open a disk cleaner wanting space back, not a map. Quick Scan looks only where junk collects — caches, logs, build output, Xcode derived data, and the caches six package managers keep — and is done in about five seconds. Then one button clears it.
Coding assistants are among the heaviest things on a developer disk and nothing measures them. DiskDuo finds Claude Code, Claude, Codex, Cursor, Gemini, Copilot and the rest, shows what each is using and which of it is cache, and reads their own session files for what those sessions cost in tokens.
Stage what you want gone and review the list: what each item is, where it came from, and what it frees. Then it goes to the Trash, never straight off the disk. The parts of macOS that must not be touched cannot be staged at all.
DiskDuo reads the protections macOS already has — System Integrity Protection, Gatekeeper, FileVault, the firewall, XProtect — and says plainly which are on. It lists what starts by itself, which apps can see your screen or read every file, and what your browser extensions can reach.
The malware scan uses the XProtect rules already on your Mac, over your apps, downloads, shared and temporary folders, and everything that starts by itself. No signatures to download, nothing uploaded, and anything found can go to the Trash.
Sizes, then edges, then a full hash, then a byte-for-byte comparison. Copies that are clones on APFS free no space, so they are left out rather than counted as a win.
Each app with its real footprint, when you last opened it, whether Apple notarized it, and every file it has put around your Mac — with the reason each one was matched to it.
Processor, memory, network and disk, measured every second and drawn beside the last ninety, so a spike reads as a spike. The menu bar keeps free space in view, with the same figures a click away.
Nine views
A treemap answers “what is big”. A sunburst answers “where does it sit”. An age map answers “what have I not touched in a year”. They are the same scan, and they keep the same selection between them.
macOS 14 or later. One payment, no subscription.