how do you turn off a mac?

unplug it?

or.... SLAM it up against a wall :-D

At the bar at the top there is a little apple.. click on it then go to shut down...

if your using a laptop then there is a power button at the top in the middle

If you're using a regular mac computer, there is a button on the back you can press

go on the left top then you see a apple logo then click on it then click shutdown

unplug it :)