VLC is nice, but having stuttering problems when playing VCDs. The other best option is Mplayer OSX Extended.
- Download and install from this website: http://www.mplayerosx.ch/#downloads, from Google Code.
- Also, install the Mplayer Binary Codec Package.
- To run Mplayer, go to Applications->Mplayer OSX Extended.
Mplayer OSX Extended Icon
- Then, File->Add to Playlist and under Devices, choose CD->MPEGAV folder, which has some .DAT files on it. Choose the last file (when it's the first VCD).
- Then, Window->Show/Hide Playlist, and click the Play button.
- When it is playing, you may want to put it to fullscreen: Movie->Fullscreen and change Aspect Ratio to Zoom to Fill or Stretch To Fill.
That's it. Enjoy!