Weight in order:
MacBook Pro 17" weight: 6.8 pounds (3.1 kg)
iBook 14" weight: 5.9 pounds (2.7 kg)
MacBook Pro 15" weight: 5.6 pounds (2.54 kg)
MacBook weight: 5.2 pounds (2.36 kg)
iBook 12" weight: 4.9 pounds (2.2 kg)
PowerBook 12" weight: 4.6 pounds (2.1 kg)
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