I have similar issue even if my MAC is not a M1 one. S3D v4 was really usable on my MAC core i7, 16GB of ram, SSD = 1TB S3D V5 is almost unusable at all, even with low triangles sty files. before slicing, it is slllooooowww when I slice, I cannot turn around, zoom, or do anything. so bad, I can unde...