Using and External Plugin when transferrign platforms

I want to use a library in my Unity project, but I am having a really tough time building it in OSX(my primary platform). However, I think I can get it working in mono on Linux, so I am wondering if it is ok to build the files on Linux then transfer some of them to OSx. Is this possible? which files would I have to transfer? Dlls/.so/other?

Also, are there any good tutorials on this issue, I am not used to working with mono and dlls, and this would be my first time working w/plugins on Unity3d pro?

Btw, I am using a library called EmguCV(which is in C# but a pain to build on OSX 10.6)