Playing VOB Files on Mac OSX
http://www.iskysoft.com/convert-vob/...erter-mac.html
I found a separate app to playback VOB files. ^^ And to grab screen captures from VOB video files. You can't do screen caps with DVD Player.
I used to do screen caps with MPEGStreamClip, but they must have died in 2012. The old MPEGStreamClip workhorse that I did so much with earlier in my production history, has not worked with the last few versions of OSX.
http://www.iskysoft.com/convert-vob/...erter-mac.html works!!
Like everything else, there's free and pay versions.