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How to Upgrade iMac RAM (21.5" and 27" Aluminum): EveryMac.com
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iMac Intel 21.5" EMC 2428 (Mid 2011) Memory Maxxer RAM Upgrade Kit
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iMac Intel 21.5" EMC 2428 RAM Replacement - iFixit Repair Guide
How to upgrade RAM on iMac 21.5" 2011 - YouTube
Apple iMac A1311 All-In-One- 500GB HDD, 4GB RAM, Intel i3 CPU, OSX 10. – Buffalo Computer Parts
HOW TO: Upgrade The RAM to 32GB on a Mid-2011 21.5inch iMac - YouTube
Apple iMac A1311, Intel Core i5-2nd Generation CPU, 4GB RAM, 500GB HDD, 21.5 inch Display
Install memory in an iMac - Apple Support
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iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
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Buy Apple iMac A1311 Mid 2011 21.5" i5 2.70GHz 8GB RAM 1TB HDD Yosemite Ra Online | Technology Locker
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21.5-inch or 27-inch iMac (Mid 2011) Memory Installation iMac12,1 iMac12,2 - YouTube
