www.makemkv.com

Thanks! I will check it out.

Thanks. I paid for a subscription (my second IIRC) and the problem went away like magic.

I have been using v1.10.2 in a different computer. This MacPro computer has Sierra. I downloaded v1.10.2 and tried to use it on a DVD I own but a message says the version is "too old." I do not see a newer version.