Getting space back on a Mac, without guessing

Every guide here answers the same question for a different corner of your Mac: does it come back if I delete it? Each gives the folder, what it is, how to see its size, and how to clear it safely with the tools you already have.

• How to clear System Data on a Mac, safely

  What’s inside the grey System Data bar, how to measure each part in Terminal, and what you can clear: snapshots, caches, iPhone backups, installers, Docker.

• Is it safe to delete? Plain answers for 40 Mac folders

  From ~/Library/Caches to Docker.raw: one verdict each, Safe, Rebuilds, You decide or Leave alone, and how to clear it.

• Xcode DerivedData, node_modules and Docker: what’s safe to delete

  Where Xcode, Node, Python, Docker, Homebrew and Gradle put tens of gigabytes, and the commands that clear it without breaking a project.

• What Claude Code, Cursor, Ollama and Hugging Face leave on your Mac

  Session transcripts, editor caches and multi-gigabyte local models: where each AI tool keeps them and which are safe to clear.

• SiftMac vs Sift (sift-mac.com)

  Two different Mac apps with similar names: who makes each, yearly vs one-time, and when each is the better choice.

• SiftMac vs CleanMyMac

  A CleanMyMac alternative with no subscription: what each does, what each costs, and when CleanMyMac is the better choice.