Yes, 20 times at least....
Follow these steps for iMac, Mac mini,
Mac Pro, and Xserve.
- Choose Apple menu > Shut Down.
- After your Mac shuts down, unplug the power cord.
- Wait 15 seconds.
- Plug the power cord back in.
- Wait 5 seconds, then press the power button again to turn on your Mac.
Did not help at all....