CoreTend

CoreTend

See what fills your Mac. Clear it safely.
Your whole Mac in one click, caches and developer files cleaned in one review, apps uninstalled completely — everything goes to the Trash, with Undo.

Website · Download · What's new in 2.3 · Français

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Four spaces

Space	The question it answers
Home	How is my Mac, and what can I do now? The space CoreTend can give back, one button away.
Space	What takes the space? A map of your home folder, large files and exact duplicates.
Clean	What can I remove safely? 30 rules read at once — caches, logs, Xcode, simulators, npm, pnpm, Gradle, Cargo, Mail, AI tools and local models (Ollama, LM Studio), broken login agents, disk images — safe items ticked, one review, Undo.
Apps	Which apps take space or start on their own? Uninstall completely: the app and the files it left.

History of every scan and move stays at the sidebar's foot.

Around the Mac

• Shortcuts and Siri: Get Free Space, Get Space to Clear, Open CoreTend (read and open only).
• Widget: free space and what the last Clean found.
• Finder: right-click a folder › Analyze with CoreTend; or drop it on the Dock icon.
• System features (optional): tidy /Library/Caches and turn third-party system services on or off, delete a local Time Machine snapshot or rebuild the Spotlight index, through a small signed helper installed only when you turn it on in Settings › System.

What CoreTend will never do

• Erase your files for good. Moves go to the macOS Trash after your review; CoreTend checks each item again just before, and Undo puts it back. The one exception is a local Time Machine snapshot you pick and confirm in Settings › System, which macOS cannot put back.
• Scare you. No health score, no alarm, no invented figure.
• Watch you. No account, no telemetry, nothing in the background. CoreTend asks this site whether an update exists (you can turn it off), and reads your apps' own update feeds only when you click Check for updates in Apps.

Install

• Download CoreTend-2.3.0-universal.dmg (notarized) from Releases or the site.
• Homebrew: brew install --cask ahmetbsbnr/coretend/coretend (also links coretend in your PATH)
• Terminal and AI assistants: coretend on npm — npx coretend clean · npx -y coretend mcp; see docs/CLI.md.

macOS 14 Sonoma or later, Apple silicon or Intel. English, French, German, Spanish, Italian and Japanese (follows macOS). CoreTend asks for Full Disk Access once, to read Mail, Safari and app data; without it, it reads what macOS allows.

Build from source

swift build --product CoreTendApp   # the app
swift build --product CoreTendCLI   # a read-only command-line tool
make check                          # tests, the safety audit and the site checks
make app                            # an unsigned CoreTend.app in Artifacts/

Swift 6, SwiftPM; one runtime dependency, Sparkle, for signed updates. The code is organised in modules: DesignSystem (the Serre design and the living greenhouse), ScanCore (read-only scanning), SafetyCore (the only code that may move a file — to the Trash), Domain, Persistence, AppShell and the app itself, plus the widget (CoreTendWidget), the Finder menu (CoreTendFinder) and the optional system helper (CoreTendHelper, HelperProtocol), which link no other package.

Contributing

Read CONTRIBUTING and GOVERNANCE. Security issues: SECURITY. Privacy: docs/Privacy.md. Code under Apache 2.0, documentation under CC BY 4.0 (docs/LICENSING.md).