It’s been so long that since I’ve had to burn real, physical media that I’ve completely forgotten how to do it - especially on MacOS.

Anyway, it turns out all you have to do is right click on the iso and select burn.

MacOS DVD burning dialogue

And, just like that, I’m now an owner of a Kubuntu 19.04 install CD.

Burnt Disk

In other good news, it appears that my external blu ray reader/writer still works!