- AChat on MacOSInstall version of a Software called "Parallels" http://www.parallels.com (I dont know if the older Versions are already for free but you can also use a trial) - We did it on Mac OS Lion, using Parallels Desktop 7.
Parallels gives you then an operating system vitualization platform - such as VMWare or MSVirtualserver on a Windows platform..
Configure a Virtual Machine and Install any (XP or newer) version of Windows - maybe you have an old License from an older machine you dont use any more - we took Windows XP SP2. If you wish - run updates and do the "standard" security Installations on the virtual Windows system. Go to the AChat Website (from the Virtual Windows), download, install and configure Achat.
Here you go! AChat on MAc OS Lion

Questions? Feel free to use "PM-button" and ask SquirrelDee