I've gotten the XLR8 Interview to work with Final Cut 1.0, so it should work with 1.2.5. I did this a long time ago, but as I recall, all you had to do was go to the preferences panel and change your video source to XLR8 from the DV setting. I can't give you exact instructions since I did this by combing my XLR8 with a friend's Final Cut Pro, hence I don't have Final Cut Pro myself.