Lately my magic_mouse is becoming unresponsive at the login screen, thus resulting in loss of control of my computer. I have changed batteries, turned both the computer on and off to no avail. Sometimes I can regain control by plugging in a USB mouse, but this hasn't worked in all cases. I have also checked system preferences and the device is checked as discoverable, and enabled to wake the computer. I've had my system for two years with no issues until recently. Ideas??
