My Powerbook G4 came with a S-Video to Composite video adapter cable which comes in handy sometimes. So if you have an S-video port on your Mac and you can find this adapter, hook it to your Sony co-ax cable and it might work. Look here and scroll down to see the adapter cable: http://www.hardwaresecrets.com/article/157/4 PJ > I have gotten hold of a Sony Monitor that only has co-ax > input for > video. Is there a way to use this on a Mac.