Slaving Pro Tools on mac to Cubase on PC:VideoSlave Software

This might get you started but really you should google the matter.

There are lots of posts on this forum as well as Gear Slutz about how to do this, but when I tried a couple months ago, I never really got it going the way I wanted it to. But I only tried more as an experiment rather than I need this to work now as I’m quite happy with putting video in Cubase.