Ensure your browser is not in "Private" or "Incognito" mode, as this will log you out every time you close the window. 3. Check for macOS Updates

Be cautious of websites offering "Legacy WhatsApp DMG" downloads. These are often outdated, unsupported, and can pose significant security risks to your data and device. Download WhatsApp for Desktop

If you are on macOS 10.13 (or a similar legacy version), you do not need to buy a new computer to use WhatsApp. While the dedicated "Desktop App" is unavailable to you, provides 95% of the functionality (texting, media sharing, document viewing) without needing a system update.

If you are determined to try and get a standalone version running, consider these points: 1. Older App Versions (Not Recommended)

The previous version (10083) had three notorious bugs. Version 10136 addresses them:

: You can no longer download the latest WhatsApp Desktop app from the Mac App Store if you are on 10.13.6, as it will be listed as incompatible.