Converting plugins from Rhino 4 Win to Rhino 5 Mac

Anyone here who can convert plugins from Rhino 4 for Windows to Rhino 5 for Mac?
My company is exploring the possibility of moving to the Apple platform and need current plugins for Rhino 4 on Windows to work for Rhino 5 on Mac OS X. The plugin developer will not do this due to lack of Mac OS X knowledge.
Plugins are used to import binary .stl files and keep the corrected files in their correct folders for ordering left and right foot insoles.

At the moment it is not possible to create / use plugins on Mac.
So i should wait with moving to the Apple Platform if you need the plugins.

Here is the current story…

I should also add that the initial plug-in support will probably be for .NET plug-ins based on RhinoCommon. You might consider this as you consider the v5 platform.