Running requires using WhatsApp Web because the official desktop application now requires macOS 11.0 (Big Sur) or newer. While older versions of the app once supported High Sierra, they have been phased out in favor of a native "Catalyst" version that only works on more modern operating systems. Best Way to Use WhatsApp on macOS 10.13.6
However, you can still stay connected using the alternative methods below. 🌐 The Best Workaround: WhatsApp Web whatsapp for macos 10136
If you want, I can:
whatsapp.com/download..dmg file (size ~150 MB).NSUserNotificationCenter API, fixing the issue where unread counts would persist after reading on iPhone.