With the update to OSX Sierra, Mac has reallowed the burning of .ISO files from the computer.
1. Find the DVD file you are trying to burn in Finder (it probably saved to your downloads folder)
2. Right click on the ISO(DVD) file and click on "Burn Disk Image "Name_of_Video.iso" to Disc"
3. A new window will appear - click on "burn" and the video will begin to burn
The disc will automatically eject once the video has been burned.
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