Apple's Mac Storage Experience Is Terrible. We Built Headroom.

The “System Data” shrug

Open macOS Storage settings when your disk is full. You get categories and recommendations, but the category that most needs an explanation can be the least helpful. Apple says System Data includes logs, caches, virtual memory files and other resources. Its own guide says you cannot manage the contents of that category from Storage settings. That is a remarkable answer to give someone whose computer is running out of room. When it comes to helping customers understand their own storage, Apple has been a terrible company to rely on. Apple documents the limitation itself.

Apple does offer storage recommendations and says macOS clears some safe caches when space is needed. That helps, but it does not answer the question in front of you: which folders are large, what created them, and what happens if I remove them? A broad label is not a plan. Waiting for the operating system to decide when to reclaim space is not much comfort when you need it now. Apple describes its automatic cleanup here.

Developers feel the gap every day

A working Mac accumulates more than photos and downloads. Build output, Xcode DerivedData, dependency folders, package caches, logs, disk images and virtual machines can consume serious space. Some are easy to recreate. Some take time to rebuild. Some contain data you should never delete casually. A useful storage tool has to show the difference, not simply display a big number and offer a “clean” button.

We saw a need for that clarity, and we felt it ourselves. We use Macs for our work. We needed to find the space we could reclaim without gambling with a project or a personal file. Avi built Headroom to solve that practical problem, and made it available to everyone facing the same one.

What Headroom does

Headroom scans a folder or disk and shows where the space went in a sortable folder tree and an interactive treemap. It finds byte-for-byte duplicates and common developer clutter, then gives recognized items a plain-language safety verdict. Its menu bar monitor keeps free space visible and can warn before the disk gets critically low.

The safety choices matter as much as the scan. Deletion is user-initiated. Trash is the default, so you can recover a mistake until you empty it; permanent deletion is an explicit option. Scanning and analysis stay on the Mac. There is no account, analytics in the app or subscription. The source code is public under the MIT license, so you can inspect the tool before trusting it with your files.

Apple should have made this easier

People should not have to install a separate application to understand their own computer's storage. That is the part of Apple's Mac experience we think is indefensible. macOS already knows where the files are. It should make that knowledge usable, explain the tradeoffs and let people make informed choices. Until it does, tools like Headroom fill the gap Apple leaves open.

We built Headroom because the demand is real and personal. We wanted the tool ourselves, and we would rather share it freely than turn a basic answer about your own disk into another monthly bill. If your Mac is short on space, try Headroom. If you want to see exactly how it works, read the code.