Mac storage questions, answered
Each guide answers the question in full with what macOS and the apps already give you, then shows how the app does it. None of them asks you to type a command.
Why is System Data so large on a Mac?
System Data is what Storage settings can't sort anywhere else. What's usually in it, which parts macOS clears by itself, and which ones you can safely clear.
What is purgeable space on a Mac?
Purgeable space is storage macOS says it can free when it needs to. Why Finder counts it as available, why a large copy can still fail, and how to get it back.
Time Machine local snapshots: what they are and how to remove them
Local snapshots let Time Machine restore files while the backup disk is away, and can hold space no folder shows. How to see and remove them with Disk Utility.
How to free up the space Xcode uses
DerivedData, simulators, runtimes and device support add up to tens of gigabytes. What each is, which come back on their own, and how to remove them in Xcode.
Why Docker.raw is so large, and how to shrink it
Docker Desktop keeps images, containers, volumes and build cache in one disk image. Why it looks so large, what it really takes, and how to free space in it.
Finding and removing old node_modules folders
Each JavaScript project keeps its own copy of its dependencies. How to find the projects you've left and remove their node_modules without losing anything.
Where Ollama and LM Studio keep models, and how to remove them
Local models are among a Mac's largest files. Where Ollama, LM Studio and Hugging Face keep them, why Ollama names them by hash, and how to remove one safely.
How to find and delete old iPhone backups on a Mac
Every iPhone or iPad backup on a Mac is a full copy of its data. How to see the backups, which device made each one, and how to delete the ones you don't need.
How to uninstall a Mac app and the files it leaves behind
Dragging an app to the Trash leaves its caches, settings and background helpers. Where those leftovers live, which are safe to remove, and which hold your data.
Why Finder, Storage settings and Disk Utility show different free space
Three tools, three numbers, and none of them is broken. What each one counts, and which number to trust before a large download or a macOS update.