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When I put my MacBook Pro (2011, 13") to sleep and wake it up again, the Magic Trackpad doesn't get recognized. I have to turn Bluetooth off and back on again to get the trackpad to work. It shows up in the Bluetooth menu at the top of the screen, but telling it to reconnect doesn't do the trick.

I have a USB keyboard, so I don't know if the same problem would be true of the keyboard.

Why might this be? Is there a way to have Bluetooth automatically restart when I wake the computer?

EDIT: I should mention that this has only happened since I upgraded from Snow Leopard to Lion last week.

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Did u try to press the power button on the Magic Trackpad (then the green light will be on for a short while)? Then you MBP will find it. –  kukoo Sep 13 '11 at 15:37
Yes, I've tried that, as well as powering the trackpad off entirely and turning it back on. No dice. –  Steve Nay Sep 13 '11 at 19:07
I have the same sleep issue mentioned above, on two different Mac Pro. One is running Lion, the other Snow Leopard. Coming out of sleep, the bluetooth system pref pane shows the trackpad connected, but the trackpad itself does nothing, i.e., no cursor movement or any on screen response. Same behavior on both Macs. –  user15301 Dec 20 '11 at 8:10

1 Answer 1

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Try re-pairing the trackpad. Go to System Preferences then Trackpad then Setup Bluetooth trackpad... Select the trackpad and then Unpair. Then select it again (using your built-in trackpad) and select Pair.

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