Microsoft is making available on its website dedicated to the Mac world a new beta version of Microsoft Messenger for Mac.
Microsoft Messenger for Mac 8 has, as main novelty, the addition of audio and video calls, a feature that was expected for some time from Mac users.
You can download Mac Messenger 8 beta, by following this link.
You can then connect with your account Messenger / Windows Live usual. Of course, I remind you that the betas are often subject to failures as this are not final versions.