Simplify seems to have an issue with the newest version of Mac OS X 10.11.5 (15F31a). I know this is a beta and that maybe the cause and it may just go away. What happens is Simplify just paused in the middle of the print. Next the Force Quit window popped up saying that my mac has run out of memory. The word (paused) in red letters is next to Simplify3D in the Force quit window. Is it possible that Simplify has a memory leak? I tried to bring up Activity Monitor to get a better idea of what was going on but I OS X just froze everything until I quit Simplify.