Symptoms
If you’re having trouble with your wireless mouse or keyboard, clicking the mouse may wake it or the keyboard up.
Wireless Connection issue
Make sure Bluetooth is turned on
If the "Show Bluetooth status in the menu bar" option is not enabled in the Bluetooth System Preferences, the Bluetooth icon will not display in the menu bar. Enable this option in System Preferences, then check the status of the Bluetooth icon in the upper right menu bar. If the Bluetooth icon does not appear in the menu bar, restart your computer.
Make sure the wireless mouse and keyboard are turned on.
Mouse
1) Slide the On/Off switch on the bottom of your mouse to turn it on. Note: If the battery compartment cover is not installed properly the On/Off switch may not function correctly or may be difficult to operate. Remove the battery compartment cover and carefully reinstall it.
2) When your mouse is on and paired, and the batteries are charged, the indicator light glows steadily.
3) If your mouse isn’t paired with a Mac, the indicator light will blink, indicating your mouse is in discovery mode and ready to pair.
4) If the indicator light doesn't illuminate, check to make sure you have two good batteries and that they're installed correctly.
Keyboard
1) Push and release the On/Off switch to turn on the Apple Wireless Keyboard.
2) When your keyboard is on and paired, and the batteries are charged, the light will glow steadily for several seconds, then turn off.
3) If your wireless keyboard isn’t paired with your Mac, the indicator light will begin to blink. This indicates your keyboard is in discovery mode and ready to pair with your Mac.
4) If the LED doesn't light up, remove the batteries to make sure they're good and that they're installed correctly.
Check preferences
From the Apple () menu, choose System Preferences, then choose Bluetooth from the View menu. The Bluetooth preferences pane will list the Bluetooth devices paired with the computer, the status of the devices (paired or connected), and whether Bluetooth power is on or not.
1) Click the gear icon and choose "Connect" to connect a device that is powered on.
2) To set up a new device, click the + icon and follow the Bluetooth setup assistant.
3) If the Mouse System Preferences pane is open and no wired or wireless mouse is connected, your Mac will immediately start looking for a wireless mouse (with Mac OS X v10.6. For Mac OS X v10.5, the Setup Assistant should open).
Keyboard or mouse intermittently stops responding
Click the mouse
1) Click the mouse once to reconnect it with your Mac. It may take a moment for the mouse to respond.
2) Check the battery level of the mouse. Choose System Preferences from the Apple (), then choose Mouse from the View menu. The battery level indicator is in the lower-left corner. Replace the batteries if they are low.
Note: Choose Keyboard & Mouse from the View menu with Mac OS X v10.5.
Press a key on the keyboard
1) Press a key on the keyboard to reconnect it with your Mac. It may take a moment for the keyboard to respond.
2) Check the battery level of the keyboard. Choose System Preferences from the Apple (), then choose Keyboard from the View menu and select the Keyboard tab. The battery level indicator is in the lower-left corner. Replace the batteries if they are low.
Mouse does not track as expected (jittery, jumpy, slow, fast)/Mouse buttons do not work as expected.
The Apple Wireless Mouse can be used on most smooth surfaces, however if tracking issues occur try these options:
1) Choose System Preferences from the Apple () menu, then choose Mouse from the View menu. Set the Tracking slider to adjust how fast the pointer moves as you move the mouse.
2) Try using a different surface to see if the tracking improves.
3) Turn the mouse over and inspect the sensor window. Use compressed air to gently clean the sensor window if dust or debris is present.
4) If multiple Bluetooth wireless devices are in use nearby, try turning them off one at a time to see if the issue improves. Bandwidth intensive devices could affect tracking.