Yes, I searched the other Death Adder posts. *I* didn't find anyone else with this particular problem. I thought I posted for help before, but possibly on another site. Aluminum iMac, latest OS X, and, when last used, latest Razer drivers. I get my settings where I want them, use the computer, stop, it goes to sleep, and when it wakes up my Apple mouse settings (in System Preferences) have changed to a slower track speed. I can't get the mouse to the track speed I want solely with the Razer drivers. I set the track speed in System Preferences, then fine tune with Razer drivers. I ended up frustrated, uninstalled the Razer drivers, and I just use it with the Mac mouse settings. I am not a power user, regular stuff plus WoW. The track speed reset was frustrating, otherwise enjoy the mouse. Any suggestions or questions to help diagnose? Anyone with similar issues?