Question: DVD authoring programs don't work on High Sierra
I run an iMac with OS 10.13.3 and also Final Cut Pro 10.4. I want a more sophisticated DVD program than what is available on FCP share. I have looked at Titanium Toast which I think is fairly ordinary. The Roxio DVD creator is much better looking format than the basic Toast program except that DVD creator will not accept .mov film clips. I have talked extensively with Corel but have no explanation. I have looked at other authoring programs such as WonderShare DVD creator and iSkySoft DVD creator. They all give the same error message that the .mov file type is unsupported. Apart from going back to my trusty DVD Pro Suite (2008) which is unsupported on my current Mac but still runs on one of my older machines, what options are there? There seems to be a systems problem. Is it due in some way to the 64bit architecture?
1. Why are the .mov files unsupported on my iMac High Sierra?
2. What decent DVD authoring programs that work on High Sierra are available?