I don't have a DeathAdder, but I have had really a lot of mice over the years whose software (especially on OS X, but really just in general) utterly sucks. At

I don't have a DeathAdder, but I have had really a lot of mice over the years whose software (especially on OS X, but really just in general) utterly sucks. At least through 10.6, 10.7, and 10.8, and maybe going back longer than that, I've been using ControllerMate to program the functionality of all my mice (and some of my non-Apple keyboards). It's more of a general purpose visual programmer for input devices than a mouse driver, but works great for that limited use case. It's a great help for the common case with mice of great hardware coupled with terrible software. I haven't installed third-party mouse software since I found it. Might be worth checking out. (Not affiliated, just find it useful...) http://www.orderedbytes.com/controllermate http://www.orderedbytes.com/controllermate