Magic Trackpad gestures don't work A brand new Magic Trackpad has been paired to a 2011 Mac mini with OSX 10.8. This mini has no other bluetooth devices. OSX was upgraded in-place from Lion to Mountain Lion.

The trackpad doesn't perform the gestures. 

The Bluetooth menu shows that there's a mysterious bluetooth mouse device still as of yet unconnected. Various attempts to have it connect are unsuccessful. I suspect this is the gestures functionality, but it may be a previously connected mouse (unsure).

Various fixes attempted:


reset PRAM with Cmd-Option-P-R at boot.
reset SMC by pressing power when unplugged


How can I get this Magic Trackpad to be recognized by OSX Mountain Lion?
I don't have another Mac to try to reproduce this problem on (trying to determine if the trackpad itself is bad).
It's possible that the kernel extension for the trackpad isn't loading properly.

Try these steps and see what happens.


Open Terminal and type kextstat | grep AppleBluetoothMultitouch and hit enter.

If nothing along the lines of 69    0 0x19d2000  0x3000     0x2000     com.apple.driver.AppleBluetoothMultitouch (160.7) &lt;68 64 30 4 3&gt;
 shows up, then the kext isn't loading.

If you did get text similar to that above, try unloading the driver with the command sudo kextunload /System/Library/Extensions/AppleBluetoothMultitouch.kext. There may be some error messages that spit out, you can ignore them for the moment.
Try reloading it with the command sudo kextload /System/Library/Extensions/AppleBluetoothMultitouch.kext


If after that it doesn't show up in Keyboard Preferences, I'm out of ideas - it may be time for an exchange or a trip to the Genius bar, as it's likely a hardware issue.

It may also be helpful for other's diagnostic purposes to amend your question with the output from the Bluetooth section of System Information (in the /Applications/Utilities folder).