BetterChat for WhatsApp (was BetterApp for WhatsApp) brings seamless integration by using native notifications, full support for audio messages and media upload, an elegant user interface, and much more. It's the only app that allows you to receive and send audio messages and take photos and videos from within the app! The must have WhatsApp Messenger for any Mac enthusiast! BetterChat for WhatsApp can do a lot more:
Disclaimer: BetterChat for WhatsApp is a 3rd party app. The author of this software is not endorsed by or affiliated with WhatsApp, Inc., in any way.