Letting you choose whichever platform you want, WhatsApp creates a new desktop app for those who prefer not to use their browsers and instead use a standalone app. The app is available for Windows 8 and higher users as well as Mac OS 10.9 and above. This, of course, syncs with the WhatsApp mobile apps so you can just pick up the conversation where you left off. For the desktop app, you get things like native desktop notification as well as better keyboard shortcuts. You can download it from this link. Once you’re done installing, all you have to do is open the app and scan the QR code using the WhatsApp mobile app and then look for the WhatsApp Web menu under Settings and you’re all set.
Source: WhatsApp