I started with the Apple BT mouse & keyboard for my new G5 PowerMac dual 2.3. I bought the Kensington BT PilotMouse Mini to have 2 buttons and scroll wheel. If the Apple mouse is on, the system will not recognize the Kensington mouse. If I boot with the Apple mouse off, sometimes it will see the PilotMouse. Mostly it will not. Then I have to either plug in the USB mouse, or turn on the Apple BT mouse. After the screen saver comes on, the Apple mouse works fine. If the PilotMouse was working, after the screen saver, it will not work. Even pressing the button on the bottom and clicking have no effect. Back then to the Apple mouse. I've been unable to get any response from Kensington tech support. Any ideas?