MacBook Pro: How to remove or install memory - Apple Support
Timetec 8GB KIT(2x4GB) Compatible for Apple DDR3 1067MHz / 1066MHz PC3-8500 CL7 for Mac Book, Mac Book Pro, iMac, Mac Mini (Late 2008, Early/Mid/Late 2009, Mid 2010) SODIMM Memory MAC RAM Upgrade
MacBook Pro 13" (mid 2009) with Catalina? | MacRumors Forums
15-inch MacBook Pro Mid 2009 Memory Installation Video - YouTube
Apple Macbook pro mid 2009 120gb ssd 4gb ram MacOS High Sierra for Sale in Lowell, MA - OfferUp
A-Tech for Apple 8GB Kit (2X 4GB) DDR3 1067MHz / 1066MHz PC3-8500 SODIMM MacBook Pro (Late 2008 Early/Mid 2009 Mid 2010, 13/15/17 inch), iMac (Early/Mid/Late 2009, 20/24/21.5/27 inch) Memory RAM at Amazon.com
RAM Upgrades For Apple MacBook (2009 - 2010) from OWC
MacBook Pro Mid 2009 15.4” oS El Capitan 256GB SSD 4GB Ram Intel Processor: Digital Link, Conover NC $80 for Sale in Conover, NC - OfferUp
Apple MacBook Pro 13-inch Mid 2009 - 2.53GHz Core 2 Duo Laptop RAM Memory | Kingston
Apple MacBook Pro 5.5 Mid 2009 13.3" A1278, Core 2 Duo, 240GB SSD, 8GB RAM | eBay
How to Upgrade RAM in a 2009 / 2010 MacBook Pro - Memory Replacement - MacBook Tutorial - YouTube
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
MacBook Pro (Intel-based) - Wikipedia
OWC 6GB (2GB + 4GB) PC8500 DDR3 1066MHz SO-DIMMs Memory Compatible with Late 2008, Early 2009, Early 2010 MacBook, MacBook Pro Unibody Models, 2009/2010 Mac Mini, 2009 iMac Models at Amazon.com
MacBook Pro 13" A1278 Mid 2009 2.26Ghz 500GB HDD 6GB RAM OS X El Capitan | eBay
Apple MacBook Pro Mid-2009 15" Laptop | 2.53GHz | 4GB | 250GB | MacOSX – Dynamic Computer Surplus