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6 Verify that the "Use 802.3" box is unchecked (circled in the
following image). If there is a check mark in the box, click it
to remove the check mark. Then click the Info button in
the lower left corner.
7 Ensure there is a Hardware Address listed in this window. If
there is, click the OK button and close the "TCP/IP Control
Panel" (click File and scroll down to click Close). If there is
no Hardware Address, you must shut down and power off
your computer. With the power off, simultaneously depress
and hold down the Command (Apple), Option, P, and R
keys on your keyboard. Keeping those keys depressed,
power on the Macintosh. The machine will start and you
will hear the Apple chime. Keep these keys depressed for
up to 3 chimes, then release the keys and allow the
computer to start-up. When fully rebooted, ensure that all
TCP/IP settings match those in the preceding instructions. If
your computer still does not have a Hardware Address,
Configuring the TCP/IP Protocol
9
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