How to Upgrade iMac RAM (21.5" and 27" Aluminum): EveryMac.com
iMac Intel 21.5" EMC 2428 (Mid 2011) Memory Maxxer RAM Upgrade Kit
iMac RAM Memory Installation 2009 2010 2011 21 5" Apple Dollars #13 - YouTube
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iMac Intel 21.5" EMC 2428 RAM Replacement - iFixit Repair Guide
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Upgrade your iMac's RAM in less than 5 minutes - YouTube
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Install memory in an iMac - Apple Support
Install memory in an iMac - Apple Support
HOW TO: Upgrade The RAM to 32GB on a Mid-2011 21.5inch iMac - YouTube
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21.5-inch or 27-inch iMac (Mid 2011) Memory Installation iMac12,1 iMac12,2 - YouTube
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How to upgrade RAM on iMac 21.5" 2011 - YouTube
iMac Intel 21.5" EMC 2428 RAM Replacement - iFixit Repair Guide
Install memory in an iMac - Apple Support
Memory Upgrades for Apple iMac 2011 Up to 32GB
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iMac Intel 21.5" EMC 2428 RAM Replacement - iFixit Repair Guide
CMS 16GB (4X4GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Apple®
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