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MacBook Pro - Wikipedia
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Apple MacBook Pro 13-Inch The MacBook Pro "Core i7" 2.7 13-Inch (Early 2011/Thunderbolt) features a 32 nm "Sandy Bridge" 2.7 GHz Intel
MacBook Air review (mid 2011) | Engadget
Apple MacBook Pro 15-inch (2011) | Laptop Mag
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
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MacBook Air 4,2 - Full Information, Specs | iGotOffer
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
MacBook Pro review (13-inch, mid-2012) | Engadget
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How to Upgrade RAM on MacBook Pro, iMac & More | AVG
Apple MacBook Pro 13-Inch The MacBook Pro "Core i7" 2.7 13-Inch (Early 2011/Thunderbolt) features a 32 nm "Sandy Bridge" 2.7 GHz Intel
How To: MacBook Pro Late 2011 Memory Upgrade - 16GB (2 X 8GB) : 6 Steps - Instructables
Apple 15-inch MacBook Pro (Late 2011) Review
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