Yea, changing Vue.env solves my problems every time so far. (Goes and finds a tree to bang on.) I'm probably over-reacting, but it works. And I've PARTICULARLY noticed that problems happen MOST OFTEN in the material editor when you get three or more screens deep. (Such as opening the ME, opening Bumps, opening something else.) The material editor seems the most crash prone aspect of Vue on Mac, but anytime vue crashes, for whatever reason, I always replace vue.env. Michael