yamon 0.1.0

Visually pleasing, deep system monitoring for macOS

Yamon 🍊

Beautiful, In-Depth System Monitoring for macOS.

Yamon is a modern system monitor engineered specifically for Apple Silicon. It goes beyond standard CPU and RAM metrics to reveal the true heartbeat of your Mac — from Neural Engine activity to precise component-level power consumption — all displayed in an elegant, real-time web interface.

✨ Features

🚀 Deep Apple Silicon Integration

Unlock metrics that standard tools often hide:

• Total System Power: Accurate, real-time power readings (mW) derived directly from the SMC (System Management Controller).
• Power Breakdown: visualize exactly how much energy your CPU, GPU, and Neural Engine are consuming.
• Neural Engine (ANE) Usage: Track utilization of dedicated AI hardware.
• GPU Frequency & Usage: Gain granular insights into graphics performance and clock speeds.

⚡️ Real-Time & Responsive

• Millisecond Latency: Powered by WebSockets for an instant, lag-free monitoring experience.
• Historical Context: Interactive charts visualize the last 2 minutes of performance data.
• Modern UI: Built with React, TypeScript, and ECharts for a premium, responsive aesthetic on any device.

🛠️ Native Performance, Pure Python

• Native APIs via ctypes: Directly interfaces with macOS IOReport and SMC private frameworks.
• No Heavy Dependencies: Pure Python implementation without the need for compiling Rust or C/C++ binaries.
• No Sudo Required: Most metrics, including granular Power and GPU stats, function without root privileges.*

📦 Installation

Install from PyPI (Recommended)

pip install yamon

After installation, start the monitor:

yamon

Visit http://localhost:8000 to view your dashboard.

Install from Source

# Clone the repository
git clone https://github.com/grapeot/yamon.git
cd yamon

# Install in development mode
pip install -e .

📸 Usage

Production Mode (Single Server)

The most convenient way to run Yamon locally. The backend serves both the API and the compiled frontend.

# 1. Build Frontend
./build_frontend.sh

# 2. Run Backend
./run_backend.sh

Visit http://localhost:8000 to access the dashboard.

Development Mode (Separate Frontend & Backend)

For contributors who want to modify the frontend code.

# 1. Run Backend (Collects data)
./run_backend.sh

# 2. Run Frontend (Hot-reload dev server)
./run_frontend.sh

Visit http://localhost:5173 for the development server.

🏗️ Architecture

Yamon bridges the gap between low-level hardware counters and high-level visualization:

1. Collectors (Python): Low-overhead bindings to Apple's private frameworks (IOKit, IOReport).
2. Server (FastAPI): Aggregates metrics and broadcasts them via efficient WebSocket streams.
3. Frontend (React): High-performance canvas rendering for dense data visualization.

🔋 Power Monitoring Accuracy

Yamon leverages the mach_task_self() iteration method to interface with the hardware SMC. This allows it to read the System Total Power (PSTR) sensor with high precision, bypassing standard permission restrictions found in other tools.

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

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Note: While Yamon is designed to run without root, some deeply protected system metrics may unavailable without elevated privileges. The application will degrade gracefully in these cases.