I can not play my DVD's on my MAC. These were old home videos transferred from VHS to DVD's. The transfers were done about 6 years ago by a video store that is now out of business. When I click on the info it says they are UDF format. I've tried VLC player which I play most videos on but no luck with these disks. When I open the folder on the disk I can see the files. Most have a .vob but again VLC won't play nor can I play them in numerous other media players I've tried. I also can't copy them to my desktop. I tried downloading numerous burners also to try and rip them so they I could maybe convert to another format and still no luck. They only play in a DVD player but I don't even have one of those anymore (other that my disk reader for my MAC). Please help.