Configure system-wide proxies on your Mac using System Preferences, Terminal commands, or the Proxyman app for advanced features.
macOS System Preferences doesn't support proxy authentication directly. Apps will prompt for credentials, or use Terminal/Proxyman for seamless auth.
Or use Spotlight (Cmd+Space) and search "Network"
Select your active connection (Wi-Fi or Ethernet), then click "Advanced"
Your proxy settings will take effect immediately. Safari and other apps will now use the proxy. You'll be prompted for credentials when browsing.