TidyMacOn developer Macs the space usually goes to Xcode DerivedData, old simulators, iOS DeviceSupport, npm/pnpm/Homebrew caches, Docker and local AI models. TidyMac measures each with last-used dates, uses the tools’ own commands (simctl, ollama rm), skips anything belonging to an open app, and moves files to the Trash.
Sound familiar?
- DerivedData for projects you deleted years ago
- Simulators for iOS versions your Xcode can’t run
- A 19 GB model you tried once in spring
What helps
Expert details
Paths, exact byte counts and the Terminal command for every category.
Uses the right tools
xcrun simctl delete unavailable, ollama rm, tmutil — never raw deletes where a tool exists.
Skips open apps
Xcode open? Its files are skipped and the message says so.
MCP server
Ask Claude Code or Codex “what grew this week?” and get real numbers.
What usually fills a developer Mac
- Xcode DerivedData: 5–80 GB
- Simulators: 2–40 GB
- iOS DeviceSupport: 3–30 GB
- Package caches: 2–30 GB
- Docker.raw: 10–100 GB
- Local AI models: 8–100 GB
- Hidden dot-folders like .gradle and .cargo
Talk to it from your terminal
TidyMac ships a local MCP server. Add it to Claude Code, Codex or Cursor and ask about your disk in plain words.
Let TidyMac do this for you
Scan free, see every part of your storage explained, and clean only what’s safe. Everything goes to the Trash first.