I have a Razr DeathAdder 3500dpi.I have had it for about 9 months and it worked fine at one time. But I have used it for a while. Now my iMac is not detecting it in any of the USB ports. I have downloaded the latest Mac drivers and still no luck. I am running SL 10.6.8 and downloaded all the updates, at least I think I have. I'm king of stuck. I did recently set windows via bootcamp. But I am not sure that would make a difference in the SL environment.