With that lack of a native app in mind, you may want to check out WhatsMac. A free download from GitHub, WhatsMac takes WhatsApp and brings it to the Mac in the shape of an app that looks and feels rather like the aforementioned iMessage from Apple. That’s no bad thing either, with WhatsMac supporting the sending and receiving of media as well as the obligatory text.
While a native app, it’s worth noting that WhatsMac is essentially a fancy wrapper for the WhatsApp Web Client interface, which means you will need to already have your WhatsApp account suitably synced up with your phone. That also means that there is no iPhone support non jailbreak users. If you are jailbroken though, you can use this app by following the method explained here: How To Use WhatsApp Web Client With iPhone
You can downloaded WhatsMac for free from the project’s open source GitHub page here and it is obviously free for use as well. Download it, enjoy it and look forward to the day when a native WhatsApp client lands on the Mac with full support for iPhone users. That said, given the fact that the app is now owned by Facebook and we still don’t have a native Facebook app for the desktop, we really wouldn’t want to put a timescale on when a WhatsApp app will make the jump from mobile for itself.
But that doesn’t stop us from keeping our hopes up now does it? Definitely not.