I have a UC-Logic WP5540 graphics tablet (with pen and mouse). On Lion, I installed the OSX driver available from UC-Logic's web site and the tablet worked fine. However, after upgrading to Mountain Lion, the mouse does not work, although the pen does. The driver has not changed on the UC-Logic web site for almost a year and all attempts to contact the company have failed. Does anyone know of a driver that will work? I have tried some Wacom Bamboo ones but, either they don't work or I am not choosing the correct Wacom equivalent to my tablet.