What is coolrun?

coolRun is a small macOS app that sits in the menu bar and shows the live price of gold in Chinese yuan per gram, pulled from a third-party pricing API. The icon it uses is a spinning coin: the faster your computer's processor is working, the faster the coin spins. This gives you a quick visual sense of how busy your Mac is at any given moment without needing to open any other tool. Clicking the coin icon opens a system monitoring panel that shows a range of current stats: CPU usage across all cores, memory usage and pressure, storage space used and available, battery level and charging state, network connection details and upload/download speeds, system uptime, temperature readings for the CPU and GPU, and fan speed. Each metric includes color coding to indicate healthy or concerning states. The panel keeps a short history of recent readings displayed as small trend graphs. The gold price display is the distinctive feature. The app fetches data from a JD Finance API endpoint that provides the spot price from Zhejiang Commercial Bank's accumulated gold product. No account or API key is required. The app shows the price in the format 973.24 yuan per gram and makes clear that this data is for display only and does not constitute investment advice. The app is built in Swift using SwiftUI and AppKit, and requires macOS and Xcode to build from source. Pre-built downloads are available from the GitHub Releases page as a DMG or ZIP file. The README notes that the app is not signed with an Apple developer certificate, so macOS may show a warning on first launch, which the README explains how to work around. No user data is collected or sent anywhere. System stats are read locally, and the only outbound network request is to fetch the gold price. The project is MIT licensed.