13-inch MacBook Pro Mid 2009 Memory Installation Video - YouTube
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Still using a 2009 MacBook Pro, should I upgrade to the new M2 macs? : r/ macbookpro
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 RAM Upgrades (Non-Retina) - OWC
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13-inch MacBook Late 2009 & 2010 Memory Installation Video - YouTube
Grade B MacBook Pro 13" A1278 2009 2.53Ghz 1TB HDD 4GB RAM MB991LL/A | eBay
RAM Upgrades For Apple MacBook (2009 - 2010) from OWC
How to upgrade the RAM on your 13-inch MacBook Pro
A-Tech 4GB KIT (2 x 2GB) For Apple MacBook Pro Series 2.26GHz Intel Core 2 Duo (13-inch) (DDR3) (MB990LL/A - Mid-2009) 2.4GHz Intel Core 2 Duo - (13-i. SO-DIMM DDR3 NON-ECC PC3-8500
MacBook Pro: How to remove or install memory - Apple Support