Mac users interested in Karafun mac os x 10.5.8 generally download:
KaraFun gives you more than 23,000 high-quality karaoke songs recorded in professional studios. Your device instantly becomes a cool karaoke machine. A single click activates Dual Display, an additional karaoke window that you can move to your external monitor or video-projector.
kfn2mdc is a Karafun (kfn) to MidiCo (mdc) converter tool for Mac converter. With this application you can play media files (KAR, MID, MP3, CDG, Zipped MP3+G). This application is very easy to use, you simply drag and drop files and select where to put new files.