You need to restart your computer. Hold down the Power button for several seconds or press the Restart button.
I get this message several times every morning after I have started my mac, can any one help?
I have been to apple and they send me round in circles. Isa has searched geeky forums to see if they know. The apple shop said unplug USB’s that are not needed, which left me with mac mouse and keyboard. Isa has even formatted the mac on the advice of the apple shop if the first task didn’t solve the problem, it still does it every day if not once, three or four times.