Mac Storage Analyzer: See Exactly What Is Taking Up Space on Your Mac

You open Apple menu > About This Mac > Storage, and stare at a rainbow bar. Most of it is labeled "Other." You click the Manage button — it spins for thirty seconds and hands you generic suggestions like "Optimise Storage" and "Reduce Clutter." You still have no idea which specific files are filling your drive, where they live, or how to get rid of them. Sound familiar?

The built-in macOS storage overview is intentionally simplified. It is designed to give a reassuring high-level picture, not to empower you to take action. If you genuinely want to know what is taking up space on your Mac — down to the exact file, the precise path, and the last time it was accessed — you need a real storage analyzer. This guide explains why macOS falls short, what a true analyzer actually does, and how TrimyMac's suite of storage views gives you complete visibility in seconds.

The Problem with "About This Mac > Storage" — the "Other" Category

Apple's storage breakdown divides your disk into broad categories: Applications, Photos, Music, Mail, iOS Files, and System. Everything else — and it can be a very large everything — falls into a catch-all bucket called "Other."

"Other" is not a file type. It is a residual category that absorbs anything macOS cannot or will not categorize cleanly. On a typical developer Mac, Other can easily exceed 80–120 GB. On a power user's Mac with a large Downloads folder, archived projects, or years of accumulated files, it routinely exceeds 200 GB. Yet macOS offers no way to drill into it from the storage panel.

What actually hides inside "Other"? The list is long and varies per machine:

• Virtual machine disk images — Parallels .pvm packages, UTM .utm bundles, VirtualBox .vdi files. A single VM can consume 40–80 GB and sit completely forgotten in ~/Documents/.
• Xcode simulator runtimes — Each iOS or watchOS simulator runtime you have ever downloaded occupies 5–10 GB under ~/Library/Developer/CoreSimulator/Cryptex/. Old runtimes for iOS versions you no longer test against accumulate silently.
• Large movie and TV downloads — 4K movies from iTunes or downloaded via a browser can be 20–50 GB each. They frequently land in ~/Movies/ or ~/Downloads/ and are never revisited.
• Email attachments — Mail stores every attachment you have ever opened in ~/Library/Mail/. On an account that has been active for years, this folder regularly grows to 10–30 GB.
• Old backups and archives — .zip, .tar.gz, .7z archives from old projects, iOS backup snapshots, and disk image files (.dmg, .iso) that were downloaded and never cleaned up.
• Caches and log files — Application caches in ~/Library/Caches/ and log files in ~/Library/Logs/ can collectively consume several gigabytes, especially from browsers like Chrome and development tools like Docker.

What a True Storage Analyzer Does

A real storage analyzer does something deceptively simple: it reads every file on your disk, records its size, its full path, and its last-modified date, and then presents all of that information to you in a way that makes the biggest offenders immediately obvious. No categories. No abstraction layers. No "Other."

The defining capabilities of a true storage analyzer are:

• Recursive directory scanning — It walks every folder, including deeply nested subdirectories inside application containers and library folders that Finder does not expose easily.
• Sort by size — Files and folders can be ranked from largest to smallest so the highest-impact targets are always at the top of the list. There is no guessing about where your space went.
• Exact file paths — Every item shows its full filesystem path, so you can locate it in Finder instantly with a right-click, or navigate directly in Terminal.
• Last-modified date — Knowing when a file was last touched tells you whether it is active data or something that has not been used in years. A 30 GB file you last opened in 2021 is a very different risk than a 30 GB file you modified yesterday.
• Visual representation — A treemap or proportional disk map lets your eye instantly identify which folders dominate your disk, even before reading a single filename.

With these capabilities, answering "how to find what is using storage on Mac" goes from a frustrating guessing game to a five-second lookup. You see the biggest files, you see where they live, and you decide what stays and what goes.

TrimyMac Storage View — Every File, Sorted by Size, with Path and Date

TrimyMac's Storage view is the foundation of its analysis suite. When you open TrimyMac and navigate to the Storage section, it performs a full recursive scan of your home directory (and any additional paths you choose to include). The scan typically completes in under 60 seconds on an Apple Silicon Mac with an SSD.

The result is a flat, sortable table of every file on your disk. Each row shows:

You can sort by any column and filter by keyword, file type, or date range. Clicking any row reveals the file's full path and gives you instant action buttons: Reveal in Finder, Move to Trash, or Delete Forever. There are no confirmation dialogs you did not ask for, and no files are removed automatically — you are always in control of every deletion decision.

TrimyMac Large Files View — Top 100 Files in an Instant

Sometimes you do not want to sort through thousands of files. You want the answer to one question — "what are the single biggest files on my Mac right now?" — and you want it immediately.

TrimyMac's Large Files view is purpose-built for exactly that. It identifies the 100 largest individual files on your drive and presents them in a single ranked list, loaded in seconds. No waiting for a full recursive scan to finish — TrimyMac uses an efficient index to surface the top offenders almost instantly.

The Large Files view consistently surfaces the same categories of oversized files that accumulate on Macs over time:

• Virtual machine disk images (.vmdk, .vhd, .pvm, .utm)
• Movie and TV download files (.mkv, .mp4, .mov)
• Xcode simulator runtimes and developer archives
• Old .dmg installer files left in Downloads
• Compressed archives (.zip, .tar.gz, .7z) from completed projects
• Large database files from applications like Lightroom and Capture One

In practice, most Macs that have never been cleaned store several files in excess of 5 GB each. It is not unusual to recover 20–40 GB by removing just five to ten items from the Large Files list — forgotten files that have not been opened in years and will never be missed.

TrimyMac Disk Map — Visual Treemap of Space Usage

Numbers in a table are precise, but a visual representation is often faster to comprehend. TrimyMac's Disk Map view renders your entire storage usage as an interactive treemap — a rectangle subdivided into smaller rectangles, where every block's area is proportional to the disk space that folder or file occupies.

The Disk Map makes it immediately obvious when one folder dominates your storage — you do not need to read numbers to see that a block is taking up a third of your disk. A quick glance tells you which area of your filesystem deserves attention first.

The map is fully interactive. Clicking any block drills down into that folder, subdividing it further to reveal which sub-folders or individual files are the largest contributors. You can continue drilling until you reach a specific file, then take action — move to trash or delete — directly from the Disk Map interface without switching to another view.

Disk Map is especially powerful for understanding the structure of directories you rarely explore, such as ~/Library/ (which Finder hides by default) or the contents of application containers that sit deep inside ~/Library/Containers/. These hidden locations are frequently where the largest unexpected storage consumers reside.

Common Discoveries — What the Analyzer Actually Finds

After running a storage analysis on thousands of Macs, certain categories of oversized, forgotten files appear again and again. Here is what TrimyMac typically uncovers — and the specific paths where these files hide.

Forgotten Virtual Machine Disk Images

Parallels Desktop, VMware Fusion, UTM, and VirtualBox each store VM disk images in different locations, but they share one trait: they grow silently over time as the guest operating system accumulates data, and they are rarely deleted when the VM is no longer needed. A Windows 11 VM in Parallels can reach 60–100 GB. An Ubuntu development VM in UTM might hit 40 GB. Finding these files is the single highest-impact discovery for most non-developer Macs.

Common paths: ~/Parallels/, ~/UTM/, ~/VirtualBox VMs/, ~/Documents/Virtual Machines/

Old Movie Downloads

4K movie files downloaded from streaming services or ripped from Blu-ray discs accumulate in ~/Movies/ and ~/Downloads/. A single 4K film can occupy 25–60 GB. On a Mac that has been used as a media server or downloaded several films for offline viewing on a flight, these files can collectively consume hundreds of gigabytes. Unlike apps, movies do not appear in Spotlight searches or the Applications folder — they are invisible unless you specifically look for large files.

Xcode Simulator Runtimes

Every iOS, watchOS, tvOS, and visionOS simulator runtime you have ever downloaded occupies 5–12 GB on disk. Xcode does not automatically remove runtimes for old OS versions, so a Mac that has run Xcode for several years may have simulator runtimes for iOS 14, 15, 16, 17, and 18 — even though you only ever test against the latest two. The storage cost of unused runtimes alone commonly exceeds 50 GB on active developer machines.

Common paths: ~/Library/Developer/CoreSimulator/Cryptex/, ~/Library/Developer/Xcode/iOS DeviceSupport/

Email Attachments

Apple Mail downloads and caches every attachment you open or preview. Over years of use, ~/Library/Mail/ accumulates gigabytes of PDFs, presentations, images, and documents that exist nowhere else on your Mac — they are copies of files that live in your email, not originals. Deleting these attachment caches is safe because the originals remain accessible in your email account. It is common to recover 8–25 GB from this folder alone on Macs that have been used with an active email account for several years.

Common path: ~/Library/Mail/V10/ (version number varies by macOS release)

Old Installer and Archive Files

The ~/Downloads/ folder is the most consistent source of recoverable space on any Mac. It accumulates .dmg installer files for every app ever downloaded, .zip and .tar.gz archives from GitHub releases and developer tools, .pkg installer packages, and compressed backups. Most of these files are downloaded once, used once, and never needed again — but they persist on disk indefinitely. TrimyMac's Large Files view typically finds 5–20 GB in Downloads on a Mac that has not been cleaned in twelve months.

How to Take Action — Select Files, Move to Trash, or Delete Forever

Identifying large files is only half the job. TrimyMac makes it easy to act on what you find, with two distinct deletion modes designed to match different levels of confidence.

1. Select files for removal

   In any TrimyMac storage view — Storage, Large Files, or Disk Map — click any file or folder to select it. Hold Shift or Command to select multiple items. TrimyMac shows a running total of the space you are about to reclaim as you build your selection.
2. Preview before acting

   Before removing anything, use "Reveal in Finder" to open the file's containing folder in a Finder window. This lets you inspect the file, confirm you recognize it, and check whether it has been recently accessed. For any file you are unsure about, this step takes five seconds and eliminates doubt.
3. Move to Trash — the safe option

   Clicking "Move to Trash" sends the selected files to the macOS Trash. The space is not reclaimed until you empty the Trash, giving you a recovery window. This is the recommended option for any file you have not thoroughly verified, and for first-time cleanups where you want a safety net.
4. Delete Forever — for files you are certain about

   Clicking "Delete Forever" bypasses the Trash and immediately frees the disk space. Use this option only for files you are confident you will never need — such as old installer .dmg files, simulator runtimes for OS versions you no longer use, or VM disk images for VMs you have already decommissioned. This action cannot be undone outside of a Time Machine backup.
5. Verify reclaimed space

   After emptying the Trash or using Delete Forever, TrimyMac's storage summary updates in real time. You can also re-run a scan to confirm the space has been reclaimed. macOS may take a few minutes to reflect freed space in Finder's "Get Info" panel — this is normal behavior and not an error in TrimyMac's reporting.