Guides
Mac storage guides
Plain answers to the storage questions Mac users actually search for, with manual steps first.
- System Data GuideWhat's actually inside Mac System Data (and how to shrink it without guessing)System Data is Apple's catch-all storage bucket, not a broken OS. Follow a real diagnostic order to find what owns the space and shrink it safely.
- Xcode Storage GuideWhat's eating space in Xcode DerivedData (and what's safe to delete)DerivedData is Xcode's rebuildable build cache, not your code. See what else fills ~/Library/Developer, what deleting it costs, and how to clear it by hand.