DualClip

A lightweight macOS menu bar app that provides multi-slot clipboard management.
Unlike history-based clipboard managers, DualClip gives you instant access to dedicated clipboard slots via customizable keyboard shortcuts.

Features

• 3 Clipboard Slots: Slot A (system default), Slot B, and Slot C
• Customizable Shortcuts: No hardcoded key conflicts — configure your own shortcuts
• Atomic Paste: Seamlessly pastes from any slot without corrupting your system clipboard
• Menu Bar Popover: Quick-glance view of all slot contents with previews
• Privacy First: All data lives in RAM only — nothing is persisted to disk
• Zero Network Access: No telemetry, no analytics, no internet communication

Default Shortcuts

Action	Shortcut
Copy to Slot B	⌥⌘C
Paste from Slot B	⌥⌘V
Copy to Slot C	⌃⌘C
Paste from Slot C	⌃⌘V

All shortcuts are fully customizable in Settings > Shortcuts.

How It Works

1. Slot A automatically mirrors the system clipboard (⌘C / ⌘V)
2. Slot B/C store content independently via their own copy shortcuts
3. Atomic Paste temporarily swaps the system clipboard, simulates ⌘V, then restores the original clipboard — all within ~150ms

Requirements

• macOS 13.0 (Ventura) or later
• Accessibility permission (required for keystroke simulation)

Installation

Download (Recommended)

1. Go to the latest release
2. Download DualClip-x.x.x-arm64.zip
3. Unzip and move DualClip.app to /Applications
4. On first launch: System Settings → Privacy & Security → "Open Anyway"
5. Grant Accessibility permission when prompted

Note: This app is not notarized. macOS will show a security warning on first launch — this is expected for open-source apps without an Apple Developer certificate.

Building from Source

# Clone the repository
git clone https://github.com/RAKKUNN/DualClip.git
cd DualClip

# Open in Xcode
open Package.swift

# Or build from command line
swift build -c release

Note: Building from source requires Xcode or Swift 5.9+ Command Line Tools.

Dependencies

• KeyboardShortcuts — Global keyboard shortcut management (MIT)

Architecture

DualClip/
├── App/                    # App entry point and delegate
├── Models/                 # Data models (SlotIdentifier, ClipboardSlot)
├── Services/               # Core logic
│   ├── ClipboardManager    # NSPasteboard polling (0.5s interval)
│   ├── AtomicPasteService  # Clipboard swap + CGEvent ⌘V simulation
│   └── AccessibilityService # Permission management
├── Views/                  # SwiftUI views (MenuBar, Settings, Onboarding)
└── Shortcuts/              # KeyboardShortcuts integration

Security & Privacy

• No Persistence: Clipboard data exists only in memory
• No Network: Zero external communication — verified by source code
• Open Source: Full transparency for security-sensitive clipboard access
• Accessibility Only: Minimal permission footprint

Roadmap

• Secure input field detection (auto-disable in password fields)
• RAM zeroing on app termination
• Image/rich text clipboard support
• GitHub Actions CI/CD + Notarization
• Homebrew Cask distribution
• Sparkle auto-update framework
• VoiceOver accessibility support

Contributing

Contributions are welcome! Please open an issue first to discuss what you'd like to change.

License

MIT