I have also been successfully running node locked license on a Mac using Parallels virtualisation software. Have also been able to run a floating license where the license server is installed on the same virtual machine. I have not had any luck trying to connect a virtual machine to a standalone windows based license server.
It would be great to see a native Mac OS X version of SE but as I have seen on the NX forum, users need to show that there is serious demand in this market segment to make it happen. that in itself can be difficult to achieve.