
If your Mac comes with iDVD, you can directly export and burn iMovie to DVD in one go.
HOW TO USE IMOVIE ON MAC ADVANCED INSTALL
Now the only way to install iDVD on newer Mac computers is to get a copy iLife '09 from third-party sources. No longer preinstalled on Macs shipping with OS X 10.7 Lion or later and not available on the Mac App Store with all of the other iLife apps, iDVD is becoming a thing of the past. The bad news is that iDVD has been discontinued since 2011. To burn iMovie to DVD with iDVD, you, of course, will need iDVD available on your computer.

To export an iMovie project to disc, we will need an iMovie to DVD creator. As mentioned above, by doing so, we can preserve our video works better and playback them on the DVD player, Xbox, PS3, etc. But as for the iMovie videos that are pretty important, we can burn them to DVD.
HOW TO USE IMOVIE ON MAC ADVANCED HOW TO
When it comes to how to playback iMovie videos, we can enjoy them on Apple TV by using the iMovie Theater for smaller videos or share the file through iTunes & Home Sharing. We usually use iMovie to browse, share, create a new video with photos and clips, edit video for better refinements, and enhance the visual looking with special effects, etc.
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Burn videos in any format like MP4, MKV, etc.Burn iMovie to DVD to play on TV or any playable devices.Cisdem DVD Burner The Best App to Burn DVD from iMovie
