✅ : WhatsApp works inside your browser window. Keep your phone online.
Open WhatsApp on your phone → Settings → Linked Devices → Link a Device → Scan the QR code on your Mac screen. download whatsapp for mac os 10.7.5
However, you have two practical workarounds. Since the dedicated app won’t install, use WhatsApp’s web client. The challenge: old browsers on Lion (Safari 6, old Firefox/Chrome) may not work. Here’s how to succeed: ✅ : WhatsApp works inside your browser window