Firefox Extended Support Release (ESR) is available for Catalina. Download Firefox ESR from the official archive. It runs WhatsApp Web fluidly, though voice call features may be limited compared to Chrome.
Open your preferred browser and go to: https://web.whatsapp.com whatsapp web mac os 10.15.7
macOS Catalina 10.15.7 WhatsApp Web is the most reliable way to stay connected. While a dedicated desktop app exists, the latest versions generally require macOS 11 (Big Sur) Firefox Extended Support Release (ESR) is available for
By following these steps, you should be able to set up and use WhatsApp Web on your Mac with macOS 10.15.7. If you encounter any issues, refer to the troubleshooting section or visit the WhatsApp support page for more information. whatsapp web mac os 10.15.7