VOB is the format used in DVD and will not open in Apple’s video player, video editing software easily. I want to edit and play some VOB files on Mac, but the video player QuickTime, and editing programs like FCP can’t support the VOB format.
What I can do is to convert VOB to MOV, a Mac fully compatible format. To convert DVD VOB videos for playing, editing on Mac, it’s undoubtedly that a video conversion program is needed. You can just get freeware like Handbrake to make it. If you are not satisfied with the output quality, you can try some 3rd party VOB converter for Mac without any losing quality.