Select "Shutdown" from the "Apple" menu (the one with the icon of an apple in the top left corner). That's the safest way to power off. Normally you just send them to Sleep, again from this menu or by briefly pressing the power button.
Select "Shutdown" from the "Apple" menu (the one with the icon of an apple in the top left corner). That's the safest way to power off. Normally you just send them to Sleep, again from this menu or by briefly pressing the power button.