Yes. Same here. MyDVD Pro (part of the Toast 18 Pro bundle) crashes my Mac when I attempt to burn a blu ray disc. And yes I purchased the blu ray burn plug in. I’m so frustrated. My OS is High Sierra (v10.13.6) and the specs say that it will work. I was able to burn a 15gb blu ray just using Toast. Even tho it took 19 hrs!!! But I really want MyDVD bc of the menus and creative aspect of the program. This was the main reason I bought the Toast 18 Pro version to begin with. Any help out there?