A new release of the wiiuse library that allows fWiine to communicate with wiimotes has just been published. This release adds the Mac OSX support. The source code is availlable for download at: http://sourceforge.net/projects/fwiine/files/wiiuse/0.13/wiiuse_v0.13_src.zip/download. You will find into the archive what is needed to compile the library with Xcode and some instructions in the README file.
For the time being, this version has not been tested with fWiine yet. We are looking for volunteers to check the fWiine ability to run on the Mac. Thanks in advance for your feedbacks!