Toast 17 Titanium troubleshooting

Hi everyone

Last week I purchased Toast Titanium 17 for my Mac with the intention of converting my old video productions from DVD (.VOB) back into an editable format. Unfortunately toast is failing to do it's job. I've tried using various formats that are compatible with my editing software Final Cut Pro X. The H.264 codec would be best however I keep on getting a -50 mac error as the conversion completes. When I use the MPEG-4 and Quicktime movie codec the audio slips out of sync. When trying the Digital Video (DV) option Toast unexpectedly quits altogether. Ironically the MKV codec works fine but is incomparable with FCP X. Needless to say I'm at a complete loss having explored all the viable options including the numerous phone and web presets.

As well a this issue I’m also failing to create a DVD disk image from HD Quicktime files with the codec H.264. In this cace I’m getting a -111 Mac error. I’ve sent off appeals for help to their customer support to no avail.

I’m using a MacBook Pro (Retina, Mid 2012) by the way running MacOS High Sierra (10.13.6). Perhaps it’s the OS that is causing the complications?

Please any advice and help will be greatly appreciated. Thank you.