New iMac - how to burn DVDs?

MyDVD Pro - it's $20 in the app store. Not perfect, but it should work for you, and if not, at least it's only $20 instead of $300.

It depends what those DVDs will be played back on.

For instance, if you want to insert the burned/finalized DVD into a regular DVD player, then you need to use something like iDVD to make the playback selection menu and burn things to standard definition VOB files. With most capture devices (smartphones, tablets with cameras, camcorders and still image cameras that also capture HD or higher video), downsampling their video from HD or 4K to standard def really gives up a lot - image quality wise.

The new Macs don't have a built-in DVD burner, either. A few years ago, I ended up buying an external "super drive" ( https://www.apple.com/shop/product/MD564LL/A/apple... ) and Final Cut Pro. FCP has WAY more capabilities than iMovie and can share to either standard definition DVD writer like a superdrive or Blu Ray (you need a Blu Ray burner).

I also got an external LG DVD burner a couple of years ago for a Windows10 laptop. It does all the things an Apple superdrive can do for a little less money.

And along the way I realized:

1) I have not used the Apple Smart Drive for a LONG time (as in 5+ years) but it is still connected to my iMac.

2) While lots of people have DVD players connected to TVs, they are not used much anymore. Playback on smartphones or tablets = export the file so it is a MOV or MP4.

3) If playback on a computer is needed, export the finished iMovie project file as a less compressed version MOV or MP4. In this way, the larger screen does not show the decreased quality due to video compression.

4) If you want to share with friends & family, don't make discs - upload the rendered MOV or MP4 to YouTube, Vimeo or other video sharing site. You can make the video private, unlisted, password protected... Another option is to copy the MOV or MP4 video file to a SD memory card or USB "jump drive".

6) After rendering, I used to bring the video file into iTunes - and now bring it into AppleTV. This way, I can show using AppleTV (the streaming hardware device) on a large flat panel TV. If you use an iPhone, iPad or Mac, and they can support Video Mirroring, and you have an AppleTV connected to a large flatsceen smarTV, then you can video mirror to the TV from you iPhone, iPad or Mac to the TV... No DVD disc or player needed.

I missed iDVD for a long time, too - but found it is not needed. I tried Burner a few times... not happy with it compared to iDVD and ultimately changed my process flow, improved final output video quality and stopped having to buy blank DVDs..