Where your Mac storage actually goes
18 guides written from real cleanups, not generic advice. Every one names the exact folder, the command that measures it, and what is safe to delete.
-
Xcode DerivedData is probably 40GB or more right now. Here is how to check
Why DerivedData grows forever by design, what is actually inside it, and the exact commands to reclaim the space without breaking your project.
Sep 11, 2026 · 6 min read
-
How many node_modules folders are on your Mac right now
Old side projects, cloned repos and tutorial follow alongs: the node_modules count is almost always higher than people guess, and the total is measured in tens of gigabytes.
Sep 9, 2026 · 6 min read
-
Delete node_modules recursively without wrecking your projects
The Terminal recipes for finding and removing dependency folders in bulk, plus the safety checks that keep you from deleting the one you are working in.
Sep 6, 2026 · 6 min read
-
npm, yarn and pnpm keep their own caches, and they are bigger than you think
Clearing project folders is only half the job. The package managers keep global stores that quietly grow for years, and one command each clears them.
Sep 3, 2026 · 5 min read
-
Docker Desktop says 2GB. Docker.raw says 90GB. Both are true.
Why docker system prune reports 20GB reclaimed while your free space does not move, and the three ways to actually get that space back.
Aug 29, 2026 · 7 min read
-
The monthly dev cleanup: Docker, Xcode and simulators in one pass
The order that matters, the commands for each step, and how to check that the space you freed actually returned to macOS.
Aug 25, 2026 · 6 min read
-
Android Studio is eating your disk. Here is exactly where.
Emulator images run 6GB to 20GB each, and Gradle caches every dependency of every project you have ever synced. Both are safe to trim.
Aug 21, 2026 · 6 min read
-
What is actually inside macOS System Data
Caches, snapshots, swap, logs and app support files all land in the same grey bar. Apple gives you a category, not a path. Here is how to get the paths.
Aug 17, 2026 · 6 min read
-
Seven folders inside System Data you can delete today
Caches, device backups, builder output, log files and leftover installers. Each one measured, each one explained, with the safe delete rule for all seven.
Aug 13, 2026 · 7 min read
-
The hidden caches in ~/Library that nobody checks
Which folders inside the hidden Library directory actually pile up, how to measure them, and which ones to leave untouched.
Aug 8, 2026 · 6 min read
-
What is Other Volumes in Container on Mac, and why is it so large
It usually is not hidden junk. APFS containers, snapshots and system volumes explain the number, and only one of those is worth deleting.
Aug 4, 2026 · 6 min read
-
The macOS update finished and now your disk is fuller than before
Pre-update snapshots, leftover installers, Spotlight re-indexing and the new system volume. Five checks in the order that pays off fastest.
Jul 30, 2026 · 6 min read
-
Mac storage full? Here is the order to check things in
The check order that finds the missing space in a few minutes, starting with the folders Apple never shows you and ending with the tools worth paying for.
Jul 25, 2026 · 6 min read
-
Find duplicate files on Mac without paying for an app
fdupes, Finder smart folders and visual pattern spotting. Plus the honest answer about how much space duplicates usually account for.
Jul 21, 2026 · 6 min read
-
Mac running slow? Check memory and swap before you delete anything
How to read memory pressure, swap usage and CPU per core to find out whether you need more RAM, a restart or a different cleanup entirely.
Jul 16, 2026 · 7 min read
-
DaisyDisk alternatives for Mac, and what to check before you buy any of them
What a disk visualizer should do, where DaisyDisk is genuinely good, and which alternatives make sense if you also need cleanup or monitoring.
Jul 12, 2026 · 6 min read
-
A CleanMyMac alternative without the yearly fee
What CleanMyMac covers, where a narrower one time purchase makes more sense, and the free options worth knowing about.
Jul 7, 2026 · 6 min read
-
GrandPerspective vs macoptimize: which disk visualizer fits you
An honest look at what a free read only visualizer does well, and where targeted cleanup plus live monitoring changes the outcome.
Jul 2, 2026 · 6 min read
Do it once, properly
macoptimize finds every folder in these guides, shows the size before you commit, and logs what it removed. $20 one time, covers 2 Macs.