If you wanna burn a DVD movie into a new DVD disc, rip protected DVD movie to MP4 or MOV format first with a professional DVD decrypter & ripper ( try WinX DVD Ripper for Mac). Make sure your video file is not copyright protected. See details about different DVD size capacities. You should note that, due to the different measuring methods, a 4.7GB DVD-5 disc can only store 4.376GB at most and that an 8.5GB DVD-9 is able to hold 7.95GB. Based on the size of the video you'd like to burn, select a 4.7GB (for single-layer discs) or 8.5GB (for dual-layer discs). If it reads ' -R' and '-RW' in the list, you can burn DVDs without trouble.
Go to your desktop > tap Apple icon > 'About This Mac' > wait for the dialog box to pop up > 'More Info.' > 'Disc burning' > look for 'DVD-Write'. Check system specifications to be sure that you can write DVDs.Thus, you need to purchase an external DVD drive like SuperDrive. After that, none of any latter Mac comes with optical drives. The last Apple Mac to ship with an optical DVD drive was a 13-inch MacBook Pro (originally released in June 2012), but Apple has discontinued this model since October 2016. Things you need to prepare before burning: