While macOS 10.15.7 is officially in its "legacy" stage, you are not locked out of WhatsApp. By using via a modern browser like Chrome, you get nearly all the features—including voice calls and file sharing—without needing to upgrade your hardware or OS.
One common question is how to keep using efficiently on this specific version of macOS. Since WhatsApp recently updated its desktop architecture, the "Desktop App" experience has changed. Here is everything you need to know about running WhatsApp on macOS 10.15.7. 1. The Browser Method (WhatsApp Web)
WhatsApp is actively phasing out support for these older desktop clients. If you see a "This app version is expired" message, you must switch to the web version mentioned above. 3. Creating a "Pseudo-App" for Catalina whatsapp web mac os 10.15.7
If Safari gives you trouble, it might be because the version of Safari included with Catalina is no longer receiving major updates.
Browsers handle the heavy lifting, preventing your Mac from overheating. While macOS 10
You might find that the version of WhatsApp available on the Mac App Store requires macOS 11.0 or later. However, you can sometimes still run the older "Electron-based" version of WhatsApp if you already had it installed.
MacOS Catalina power-saving features can sometimes "put to sleep" inactive browser tabs. The Browser Method (WhatsApp Web) WhatsApp is actively
If you hate having a browser tab open all the time, you can turn WhatsApp Web into a standalone app-like experience using a "site wrapper." Using Google Chrome (Create Shortcut): Go to WhatsApp Web in Chrome. Click the in the top right corner. Select Save and Share > Install page as app .