I usually use good ol' VLC but it couldn't play the file that I have. Is it the file, or is there any program I need to use??
http://installingcats.com/2008/01/01/play-mkv-movies-on-quicktime-in-mac-os-x-leopard/
Suggests Perian:
http://perian.org/
I just downloaded it. Appears good. Free, though I will donate.
M
Just out of curiosity: How did you come upon this three and a half years old thread?