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20 Chapter 1
2 Plug one end of the computer’s power cord into the recessed power socket marked with the
symbol (≤) on the back of the computer.
3 Plug the other end of the power cord into a three-hole grounded outlet or power strip.
The plug grounds the computer and protects it from electrical damage while you set up.
Warning To prevent electrical shock, fire, or damage to the computer, the power cord
must fit completely over the prongs inside the socket.
Power cord plug
Power cord socket
Important Make sure the computer is located near an outlet or power strip and that you
can easily reach the plug to disconnect the computer in an emergency. The only way to
completely disconnect power from the computer is by unplugging one end of the power
cord from the outlet or power strip or from the back of the computer.
Warning This equipment is intended to be electrically grounded. Your Macintosh is
equipped with a three-wire grounding plug–a plug that has a third (grounding) pin. This
plug will fit only a grounded AC outlet. This is a safety feature. If you are unable to insert
the plug into the outlet, contact a licensed electrician to replace the outlet with a properly
grounded outlet. Do not defeat the purpose of the grounding plug!