Look at the right side of your Chrome address bar. You will see a small icon that looks like a monitor with a downward arrow (or three dots in the top right of Chrome > > Install page as app ). Click the install icon and confirm by clicking Install .

The experience of using WhatsApp Web on macOS 10.15.7 depends heavily on the browser you choose. Apple stopped pushing major feature updates to Safari on Catalina years ago, which means Safari 14 or 15 might struggle with modern web apps. whatsapp web mac os 10.15.7