The 2GB limit you’re hitting is a result of the Avid not allowing you to have a single media file that exceeds 2GB. When you capture from tape into an Avid the Avid is able to string together multiple 2GB media files seamlessly in the background, but when you Import it cannot, so you are more likely to hit the single-file-2GB limit. What you’re seeing isn’t an OS thing, it is an Avid thing.
— Wes Plate
Automatic Duck