Latest version freezing constantly

Im working on multiple files flicking from windows to mac rhino as im rendering on one computer and modelling on the other. I have noticed in this version for no particularly consistent reason rhino freezers. sometimes it has been that the viewports freeze, i can right commands but nothing happens in the view and now zoom options or anything work, and other times the curser just does its spinny thing for ages, the files arnt very large and it is happening on alot of my files, and only since i have done the latest update.
anyway just some feedback