3Touch the metal on the outside of your Mac Pro to discharge any static electricity.

NOTICE:  Always discharge static before you touch parts or install components inside your Mac Pro. To avoid generating static, don’t walk around the room until you finish installing the cards, memory, or internal storage device and replace the side panel.

Touch the metal case to discharge static.

40Chapter 3   Making a Good Thing Better

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Apple MC561LL/A, MD772LL/A, MD770LL/A, MC560LL/A manual Touch the metal case to discharge static