Hi Pleasure,
Unfortunately as the current webcam software requires windows to run there is no way to run it natively. However you do have a couple of options:
1. Install Windows on your mac alongside OSX and boot into windows when you want to chat.
2. Download some virtualisation software virtualbox or VMware player and install a virtual machine which lets you run a full windows OS in a window.
I am also working on a new chat software that we are currently testing which runs in a browser on all computers, devices & phones, which we will eventually move to using. You can join the beta group of you want to help test this in the coming weeks.
Let me know how you get on, I have used method 2 with great success on a daily basis for a few years now.
Hope this helps.
Satch