Freeing up space · What's Using Space (Storage Inspector)

Which places does What's Using Space check for big space users?

Short answer: A curated list: device backups, Xcode and Docker data, developer caches, chat and editor app data, your Downloads, Desktop, Documents and Trash, system leftovers, and big libraries like Photos and Mail.

Alongside your biggest folders, it checks a curated list of places that typically eat space on a Mac:

  • iOS device backups, Xcode simulators, archives and device support, Docker data and developer package caches
  • chat and editor app data (for example Claude, Cursor, VS Code, Slack, Discord, Teams, Spotify, Zoom, WhatsApp and Figma)
  • your Downloads, Desktop, Documents and Trash
  • system leftovers such as crash reports, Quick Look thumbnails and Mail downloads
  • large libraries shown for information, like Applications, Photos and Mail

Each row has a friendly label, so you see "iOS device backups" rather than a folder path. See what ACTIONABLE means.

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