In those days I found an estrange error with my bluetooth device. It always shows me that the bluetooth device is not available.
I found some solutions in the apple forum that could help.
For some strange reason sometimes you cannot see the answers (maintenance?), so I am to do some summary of the comment of Thomas McGrath:
1. Make sure that you have bluetooth built in.
1.1Go to "System preference" to see if you have bluetooth preference
2. Unplug all USB devices.
Unplug all USB devices and restart. It could be some problem with USB devices
3. Repair your disk permissions.
3.1 Go to Application/Utilities/Disk Utility
3.2 Select the start up disk
3.3 In the First Aid tab, you should see "Verify Disk Permissions" and "Repair Disk Permissions".
3.4 Press on the "Repair Disk Permissions" button and wait. Once it is finished restart computer.
(Sometimes when a permission is repaired, new permission problem could be detected, so repeat the step 3 until you make sure that the disk is correctly repaired)
4. Delete the preferences file for Bluetooth
4.1 Go to
and delete the file
4.2 Restart your computer
5. Reset the PRAM
5.1 Shutdown the computer
5.2 Hold down Command, Option, P and R keys while you are restarting your computer
6. Reset the power Management system. (See note 1)
6.1Unplug the laptop
6.2 Take out the battery
6.3 Hold the power button down for 5-10 seconds
6.4 Plug the battery back.
Note 1: Depending on the type of computer, there could be different way to do it. In this blog I have showed the most common way. For more information, visit the apple official forum: