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:

• Polished Mac style user interface supporting dark theme
• Receive and SEND audio messages
• Record videos and take photos directly in app
• Polish your photos before sending them
• Variety of notification sounds
• One click silent mode, for when you're busy
• Place FaceTime calls from within the app
• Automatically launch the app on login
• Customizable notifications
• Hide the dock icon and run the app seamlessly in the background
• Define a global shortcut to bring up the app window any time. Other great features:
• Integrates seamlessly into your Mac workflow
• Use drag-and-drop to send media
• Reply instantly to incoming messages right from the message notification
• Variable text sizes
• Supports custom background images
• Show unread message count in Dock icon badge
• Indication for unread messages in menu bar
• Download images and videos to your Mac
• Play videos inside the app
• Wide support for shortcuts
• Use full screen and split screen mode
• Standalone application--no need to have a Web Browser window open to write WhatsApp messages

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.