MacBook Pro – Bluetooth not available

I just experienced that a recent update from Apple rendered my bluetooth functionality completely dead. The status bar icon was greyed out with a horizontal lightning bolt looking icon crossed through it.

After some time on Google, i find i am not the only one :)
Solutions listed below worked like a charm..

Try resetting the SMC and the PRAM:

Another solution for a Intel based Macbook Pro..
1. shut down the computer.
2. remove power cord.
3. press the power button for 5 sec.
4. connect the power cord.

Worked excellent