I bought the mouse as a substitute for a mouse with a scroll ball (4-way scrolling). Unfortunately, I realized that on Mac (OS X 10.9) either very delayed, or not at all scrolls - or immediately jumps to the end of the page. Unfortunately it did not work, so I returned it. Too bad, because it was well in hand, but also 2 different users (a Mac and a PC) could not really do anything with the scrolling.
