After obtaining some backups of some DVDs that I own I have been trying to burn them to DVD-R I have two sets of .ISO files as shown below: One of the sets worked fine. 3 .ISOs all 6GB+ 1. I mount the ISO 2. It appears on the desktop as it should 3. A finder window pops up showing the contents of the disk image 4. DVD player will play the disk image without any problem I could then use a DVD shrink program to convert the images and burn to DVD5 - all of which work on DVD players. The other ser however has caused problems. Again - 3 .ISOs all 6GB+ 1. I mount the ISO 2. It appears on the desktop as it should 3. A finder window pops up which is empty 4. DVD player will not recognise the disk 5. No other programs will recognise the disk - e.g. toast. VLC will not recognise the mounted image as a disk. 6. By opening the .iso itself in VLC player i can play the disk fine... So both sets of .ISOs are from the same source and they both clearly contain the correct data (the second set played fine in VLC) and yet nothing else seems to be able to handle it ! I have no idea what to do at this point. Also - my computer has problems burning DVD DL - so i cannot just burn it to a DVD and see what happens. I am running OS X. Thanks in advanced - could really do with some help here!