www.makemkv.com

One thing it might be - what language did it have for the audio?

If you have set a preferred language in Preferences->Language, MakeMKV will not automatically select tracks for any other language.


I've never fiddled with the default settings, hence they are:
Interface language: Auto
Preferred ...

What are you using to play the MKV?...

I used VLC but I checked the media info and there definitely was no audio track.

However I'm sorted now, thanks. When I went through the online help, I found a screen shot of the Windows beta. It displayed that titles can be expanded to drill down to ...

Purchased Kurios Cirque du soleil at the show this week and wished to make a backup.
Running v1.14.5 on Mac 10.11.6 (el capitan).

Have gone back to 2015 on forums and can find no similar problem. Help pls.