Evoluent is a tiny company with limited resources. We do not supply a Mac driver because the quantity of VerticalMouses sold to Mac users is very small, but the cost of developing a Mac driver is higher than for a Windows driver. The Windows driver has been in continuous development since 2002. It has gone through 3 developers and over 60 revisions. Since we are not Mac users ourselves, we are unable to test the driver in day to day use, so developing a Mac driver will be even more difficult. Therefore the Mac driver must wait until we achieve substantially greater volume. In the meantime please use one of these shareware drivers if you want to program the buttons. Without a driver, the buttons have fixed functions.

www.plentycom.jp/en/steermouse

www.usboverdrive.com

(Evoluent has no business relationship with these vendors.)