I’ve been using Roon on the same hardware configuration for 2 1/2 years. It runs on a Macbook pro running OSX 10.8.5 (yes its quite an old OS). I have had few problems over this time but tonight it won’t complete launching. 
The rectangle quoting someone famous on their view of music appears as usual. After that the application closes. I can’t even look up the version number. What do you suggest?