page 4 of 4
You can look at the signal strength of your magic trackpad by holding down the option key while the device is selected. It will show a bar graph while the option key is held down. Keep in mind, these are negative numbers, so -50 is a stronger signal than -80.
The “Monitor Connection RSSI” (received signal strength indication) option provides the best indicator of signal strength. If you are having trouble with your trackpad, you can turn this on and verify the signal integrity between the trackpad and your Mac. It is a good idea to get a baseline of the signal while it works, and then compare it to the signal when it doesn’t work well. You can also use this to compare signal strength before and after replacing the batteries. It is a good diagnostic tool that can help you rule out issues like weak batteries and interference.
Another possibility is that your trackpad may just be dirty. Oils from your finger can build up on the surface, making it more difficult to track. If it is moderately soiled, I would recommend wiping it with a dry, clean, soft cloth. A handkerchief is perfect. I recommend shutting down your Mac before you clean your trackpad. The power button on the trackpad is a toggle, so you’ll need to remove the batteries to turn it off. If you un-pair Bluetooth, you’ll need to be handy with keyboard controls to re-pair it. You could also accidentally wake your computer while cleaning the trackpad. Thank goodness Macs boot up so fast!
If it is very greasy, I recommend using a prepackaged eyeglass wipe, such as Flents Wipe ‘N Clear. These are available at Costco in a large 200 pack, and have many uses. Highly recommended! You should never use a harsh cleaner, such as window cleaner or pure alcohol. Don’t use steel wool either…
There is post after post on the web detailing problems with the Magic Trackpad, and no definitive solution. There isn’t just one problem. Some even claim they needed to replace their CPU for this to work properly. Yikes! In fact, while writing this how-to guide, my trackpad started acting up. I had 18% battery left, but I replaced the battery. It worked fine after that. Try replacing the battery before you resort to replacing your CPU! This is a very annoying problem, but I still use the Magic Trackpad. It works most of the time and the gestures save time and make the computer a pleasure to use.