When using the MXM3S on a Mac, with Logi Options+ installed, scrolling does not behave as expected. Certain applications with scrolling gestures do not work, and scroll speed varies wildly between applications, and because you cannot turn off the god awful automatic switch between freespin/rachet mode on the mouse (either with Logi Options+, or with the physical button which is already bound to that purpose), I have to choose between installing Logi Options+ and getting broken scroll behaviour, and uninstalling it and not being able to control the scroll wheel in any precise manor.