Hi All, I wrote to the Canopus tech support about my problem with my ADVC 100 since upgrading to 10.4.10 (It wouldn't output to my TV with quicktimes that worked fine before the upgrade.) They sent this suggestion. I just did it and now all works again. Perhaps this will be of help to someone else. Canopuse tech support: If you have updated your Mac OS lately the OS 10.4.xx and QuickTime Pro 7.0, then you might want to take a look at this: This maybe helpful with the connection related problem under the OSX and Final Cut Pro http://docs.info.apple.com/article.html?artnum01852 cheers, Judith Gruber-Stitzer film composer Montreal