Why Managing Storage on a Mac Is So Painful
Every Mac owner eventually hits the same wall: the storage warning pops up, you open About This Mac, and the numbers make no sense. There is a slab of space labeled System Data or Other that dwarfs your actual photos, documents and apps combined, and Apple gives you almost no way to ask it what is actually in there. Managing storage on a Mac is painful not because Mac users are careless, but because macOS is deliberately opaque about where your disk space goes.
The "System Data" category that swallows your disk
Open Storage settings and you will see a neat bar chart, and then one grey segment that keeps growing no matter what you delete. System Data (previously labeled Other) is a catch-all for caches, logs, temporary files, Spotlight indexes, Time Machine local snapshots, and application support files that do not fit neatly into Apple's other categories. It routinely balloons past 100GB on machines that have been used for a year or two, and the built-in Storage Management panel gives you almost no way to drill into it, let alone clean it safely.
Uninstalling an app rarely uninstalls the app
Drag an app to the Trash and macOS removes the .app bundle, but it leaves almost everything else behind: preference files in ~/Library/Preferences, cached data in ~/Library/Caches, support files in ~/Library/Application Support, saved states, logs, and sometimes background helper tools that keep running. Multiply that by every app you have ever tried, and a few years of "just checking out" apps quietly turns into gigabytes of orphaned leftovers with no owner and no obvious way to find them, because Finder has no concept of "everything this app touched."
Caches that regenerate the moment you delete them
Even when you do find a cache folder and clear it, the relief is temporary. Browsers, chat apps, IDEs, design tools and the OS itself rebuild their caches within minutes of you deleting them, because caching is doing exactly what it is supposed to do: trading disk space for speed. The problem is that macOS gives you no visibility into which caches are actively useful (say, your browser's cache making pages load faster) versus which ones are dead weight from an app you stopped using a year ago. Without that distinction, most people either delete nothing out of fear, or delete everything and lose performance they didn't need to lose.
Photos, Messages and iOS backups hide storage in plain sight
Some of the biggest space consumers on a Mac are not files you created, they are files Apple's own apps quietly built on your behalf. The Photos library keeps full-resolution originals alongside its own derivative previews. Messages attachments accumulate for years by default, with every GIF, screenshot and voice memo anyone ever sent you sitting in a database you never open. Old iOS device backups from Finder or a forgotten sync can sit around for years, each one many gigabytes, with no reminder that they exist. None of this shows up when you casually browse your files in Finder, because it is not organized the way a human would organize it.
Third-party tools can't see everything either
You would expect a storage-cleaner app to fix all of this, and to an extent they do, but they run into the same wall Apple built: App Sandbox. Sandboxed apps, including anything distributed through the Mac App Store, are restricted from reading large parts of the file system, which means a storage cleaner running fully sandboxed genuinely cannot see, let alone clean, a meaningful slice of what is eating your storage. That is part of why some of the most capable cleaning tools ship outside the App Store as direct downloads: they need permissions a sandboxed app is structurally not allowed to have.
Where that leaves you
Put together, this is why storage management on a Mac feels so disproportionately painful compared to, say, deleting old files on Windows or Linux: the biggest offenders are invisible by design, the tools built into macOS are not built to explain themselves, and cleaning things up safely requires knowing which files are safe to remove versus which ones something else depends on. That is the specific gap MacCove Space is built to close: a Mac storage cleaner that scans your whole disk, groups what it finds into categories you can actually understand, and lets you review everything before anything gets deleted, entirely on your device.