How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
MacBook Pro: How to remove or install memory - Apple Support
Macbook Pro RAM Upgrade Kit- 8GB (2 x 4GB) for 2011 2012 A1278 A1286 13 15" inch 649528754257 | eBay
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MacBook Pro: How to remove or install memory - Apple Support
Apple Macbook Pro A1286
Apple MacBook Pro A1286 (Late 2008) Unibody 15" -"Core 2 Duo" 2.53GHz, 4GB RAM, 250GB HDD - Apple Force
Apple MacBook Pro A1286 Laptop, Intel Core i5-1st Gen, 4GB RAM, 500GB HDD, Nvidia GeForce , 15 Inch Display, Refurbished Laptop
2009 Macbook Pro 15" A1286 RAM Upgrade - YouTube
A-Tech 8GB RAM for Apple MacBook Pro (Mid 2012), iMac (Late 2012, Early/Late 2013, Late 2014, Mid 2015), Mac Mini (Late 2012) | DDR3 1600MHz PC3-12800 SODIMM 204-Pin Memory Upgrade at Amazon.com
How to Upgrade RAM in a 2009 / 2010 MacBook Pro - Memory Replacement - MacBook Tutorial - YouTube
MacBook Pro: How to remove or install memory - Apple Support
MacBook Pro 15" Unibody Early 2011 Repair - iFixit