Sorting by size gets you a list. Sorting by size and age gets you a shortlist worth acting on. Here's how to get both.
A single 40 GB virtual machine you use every day is not a problem — it's work. A 4 GB disk image for software you installed two years ago and never opened is pure waste. Size alone can't tell those apart. Add last-modified and last-opened dates and the waste sorts itself to the top.
System Settings → General → Storage lists categories, not files, and its two catch-all buckets (macOS and System Data) can't be opened. It has document-level suggestions for some categories, but it will not show you the largest individual files on the disk.
Finder can sort a folder by size (⌘J → Sort by → Size) and Spotlight supports queries. In Finder's search field you can add a File Size criterion — try “is greater than 1 GB”. This works for finding candidates, but Finder's folder sizes are logical sizes and large folders are slow to measure.
Terminal works if you're comfortable: du -sh per directory, or repeatedly du -sk * | sort -rn | head to walk down the tree. It's accurate but slow on multi-million-file disks, and it gives you no visualization and no safe deletion path.
A disk-space analyzer does the walk once and gives you a table you can sort by size, filter by threshold, and cross-reference against dates. On a real scan this is the difference between drilling manually through dozens of folders and reading one ranked list.
The filters worth using:
| Kind | Where it hides | Typical action | |---|---|---| | Disk images (.dmg) | Downloads | Delete — the app is already installed | | Installer packages (.pkg) | Downloads | Delete | | Screen recordings | Desktop, Movies | Keep the useful few, archive the rest | | Virtual machines | Documents, ~/Parallels, ~/VirtualBox | Keep if used; archive to external storage | | Photos / video libraries | Pictures, Movies | Manage inside the app, not in Finder | | iOS device backups | ~/Library/Application Support/MobileSync/Backup | Old devices can be removed | | Old project exports | Documents, project folders | Archive or delete | | `Docker.raw` | ~/Library/Containers/com.docker.docker | Shrink with Docker's own prune |
A lot of large “files” on a Mac are actually bundles — the Photos Library, a Final Cut library, an Xcode archive. Finder treats them as single items but they're directories. Never delete their contents individually; you'll corrupt the library. Open the owning app and remove items through it, or move the whole package to the Trash.
Two large files with the same name are not necessarily the same file, and two files of identical size are not necessarily identical. Compare content: hash partial data first, then the full file (SHA-256). Only then stage one copy for removal. Massive Disk's Duplicates view does this in that order — size match, then partial, then full SHA-256 — so “byte-for-byte identical” is a statement about content, not filenames.
Whichever route you take, delete recoverably. Moving to the Trash preserves a way back; permanent deletion does not. Massive Disk routes every removal — cleanup queue, Space Savers, Duplicates, uninstaller — through the Finder's Trash, and deliberately ships no shredder.
Use a disk-space analyzer to scan once, then sort by size and filter by a threshold such as 1 GB. Terminal users can chain du with sort, but it is much slower on large disks and gives no visual tree.
Photos and video libraries, virtual machines, developer caches (Xcode DerivedData, Simulator runtimes, package-manager caches), Docker's disk image, iOS backups, and abandoned downloads such as disk images and installer packages.
You can, but check what you're deleting first — many large items are app bundles or libraries that must be managed through their own app. And empty the Trash afterwards, since deleted files still occupy the disk until then.
Massive Disk is a native Apple Silicon app that maps every byte of your storage across six visualizations — then gives you safe, reversible ways to get space back. Scanning is free forever; cleanup tools are Pro.