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Mac OS X 10.6.4, MacBook Pro, Apple Magic Trackpad.

The trackpad is unresponsive. Right-clicking on the Bluetooth icon in the menu bar shows me gray text that says "Bluetooth not available".

I don't see a system preference item in which to fight with this, but I don't see anything relevant.

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up vote 4 down vote accepted

According to this article, resetting the System Management Controller might to the trick.

Here's how to Reset the SMC on Apple's support site.

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Under System Preferences there should be a bluetooth preference pane. Make sure it's set to 'on' and 'discoverable'.

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I fixed it by

  1. shutting down the machine
  2. removing battery
  3. keep power button pressed for 10 sec
  4. start machine again
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At which point did you insert the battery again, 2b? And how long did you remove it? – patrix Jun 5 '12 at 20:52

I have fixed by the same method as above. shut down, remove battery, hold down power button for 10 seconds, replace battery and re-start

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