The Mac cleaner that developers actually trust.
One-click cleanup for app caches, developer tools, Docker, and more — built with Rust and Tauri, not Electron.
Most Mac cleaners are either too simple (just empty the trash) or too bloated (Electron apps heavier than what they clean). MacSlim is different:
- Tiny: ~12 MB DMG. CleanMyMac is 200 MB+.
- Fast: Rust backend, sub-second scans.
- Honest: Every item shows exactly what will be deleted and why. No dark patterns.
- Developer-aware: Understands npm, pnpm, Docker, Xcode, Cargo, Homebrew — not just
~/Library/Caches. - Safe: Triple-layer protection. Won't touch files that tools are actively using.
- Private: Zero telemetry. No account required. All data stays on your Mac.
| Category | Items | Safe to clean? |
|---|---|---|
| System | App caches, logs, crash reports, Trash | ✅ Always |
| npm / pnpm / Yarn | Download caches, store | ✅ Always |
| Docker | Build cache, dangling images, stopped containers | ✅ / |
| Homebrew | Downloaded bottles, old versions | ✅ Always |
| Xcode | DerivedData, simulator caches, device support | ✅ / |
| Cargo | Registry download cache | ✅ Always |
| Pip / Go | Build and download caches | ✅ Always |
Items marked
(coming soon — PRs welcome)
Grab the latest .dmg from Releases and drag MacSlim to your Applications folder.
Requirements: macOS 13 Ventura or later, Apple Silicon or Intel.
The desktop app ships with a standalone CLI binary at /Applications/MacSlim.app/Contents/MacOS/macslim-cli. Symlink it once for terminal access from anywhere:
sudo ln -s /Applications/MacSlim.app/Contents/MacOS/macslim-cli /usr/local/bin/macslim-cliThen:
macslim-cli --scan # Scan all caches, no cleanup
macslim-cli --cache # Clean caches (with confirmation)
macslim-cli --history # Show operation history
macslim-cli --help # Full command listThe CLI shares the same Rust core as the desktop app — same scanners, same safety checks, same SQLite history database.
Prerequisites
# Rust
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
# Bun (package manager)
curl -fsSL https://bun.sh/install | bash
# Xcode Command Line Tools
xcode-select --installRun in development
git clone https://github.com/edwin-hao-ai/MacSlim.git
cd macslim
bun install
bun run tauri devBuild a release
# Apple Silicon
bun run bundle:arm
# Intel
bun run bundle:intel
# Universal binary (both architectures)
bun run bundle:universalThe .app and .dmg will be in src-tauri/target/<arch>/release/bundle/.
| Layer | Choice | Why |
|---|---|---|
| Desktop framework | Tauri v2 | Native WebView, no Chromium bundled |
| Frontend | SolidJS + TypeScript | 3–5× smaller bundle than React, no Virtual DOM |
| Styling | Tailwind CSS v4 | Utility-first, zero runtime |
| Backend | Rust | Memory-safe, fast, great macOS APIs |
| System info | sysinfo 0.33 | Cross-platform process/memory/disk |
| Process signals | nix (POSIX) | Native kill(), no shell subprocess |
| Storage | rusqlite 0.32 | Embedded SQLite, no server |
MacSlim uses a three-layer safety system before deleting anything:
- Tool busy check — if
npm,cargo,xcodebuild, etc. are running, their caches are hidden from the scan entirely. - Path allowlist — only a hardcoded set of safe paths can ever be deleted. Attempts to delete
/,$HOME,~/Documents, or anything outside the allowlist are rejected. - Pre-execution re-check — right before deletion, the tool-busy check runs again to guard against race conditions.
All cleanup operations are logged to a local SQLite database. You can review every action in the History tab.
macslim/
├── src/ # SolidJS frontend
│ ├── views/ # Page components (Scan, Cache, Process, Uninstaller…)
│ ├── components/ # Shared UI components
│ ├── i18n/ # Translations (zh-CN, en)
│ └── lib/ # Tauri IPC wrappers, utilities
├── src-tauri/ # Rust backend
│ └── src/
│ ├── scanner.rs # Process scanner & classifier
│ ├── cache_scanner.rs # Cache discovery
│ ├── cache_cleaner.rs # Safe deletion logic
│ ├── process_ops.rs # Graceful kill with respawn detection
│ ├── process_safety.rs # Safety allowlist & veto rules
│ ├── applications.rs # Running app management (bundle aggregation)
│ ├── app_scanner.rs # Installed app scanner (with icon extraction)
│ ├── residue_scanner.rs # App residue file scanner
│ ├── dev_tool_rules.rs # Developer tool cleanup rules
│ ├── uninstaller.rs # App uninstall executor (move to Trash)
│ ├── docker.rs # Docker image/container/volume management
│ └── storage.rs # SQLite history & whitelist
├── assets/ # App icons and marketing assets
└── scripts/ # Release & signing scripts
Contributions are welcome. Please open an issue before submitting a large PR so we can discuss the approach.
# Run Rust tests
cargo test --manifest-path src-tauri/Cargo.toml
# Type-check frontend
bun run build- Process management (kill zombie/idle processes)
- Cache cleanup (npm, Docker, Xcode, Homebrew, Cargo, Pip, Go)
- System cache cleanup (app caches, logs, crash reports)
- System health dashboard (CPU, memory, disk)
- Application management (view running apps with real icons)
- App uninstaller (remove apps + residue files, dev tool deep clean)
- Docker deep view (images, containers, volumes management)
- Operation history & audit log
- Custom whitelist
- Menu bar tray
- i18n (English + 中文)
- CLI tool (bundled in .app, auto-installed)
- Apple notarized release (signed DMG)
- Auto-cleanup scheduler (Pro)
- Multi-device whitelist sync (Pro)
MIT — see LICENSE.
MacSlim 是一款 Mac 专属的系统清理工具，面向开发者和普通用户。
核心特点：
- 清理应用缓存、日志、崩溃报告等系统垃圾
- 深度支持开发者工具：npm / pnpm / Docker / Xcode / Homebrew / Cargo / Pip / Go
- 进程管理：识别并终止僵尸进程、长期闲置进程
- 应用程序管理：按 .app 聚合进程，显示真实应用图标
- 应用卸载：完整卸载应用 + 残留文件清理，内置开发者工具深度规则
- Docker 深度管理：镜像 / 容器 / 卷细粒度管理
- 系统健康监控：CPU / 内存 / 磁盘实时显示
- 操作历史：每次清理都有日志，可审计
- CLI 工具：内置命令行，终端一键清理
- 完全本地运行，零数据上传，无需账号
安装方式：
从 Releases 下载最新 .dmg，拖入应用程序文件夹即可。
使用命令行工具 (macslim-cli)：
桌面 App 内自带一个独立 CLI 二进制，路径在 /Applications/MacSlim.app/Contents/MacOS/macslim-cli。建议软链到 PATH 里方便调用：
sudo ln -s /Applications/MacSlim.app/Contents/MacOS/macslim-cli /usr/local/bin/macslim-cli然后任意终端：
macslim-cli --scan # 扫描全部缓存（不清理）
macslim-cli --cache # 清理缓存（带二次确认）
macslim-cli --history # 查看操作历史
macslim-cli --help # 全部命令CLI 和桌面 App 共用同一份 Rust 核心和 SQLite 历史数据库，扫描规则、安全检查完全一致。
从源码构建：
git clone https://github.com/edwin-hao-ai/MacSlim.git
cd macslim
bun install
bun run tauri dev # 开发模式
bun run bundle:arm # 打包 Apple Silicon
bun run bundle:intel # 打包 Intel技术栈： Tauri v2 · SolidJS · Rust · Tailwind CSS v4