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Apple iMac 21.5-inch and 27-inch (Late 2013) reviews | Macworld
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How To Upgrade RAM in a Mac | Macworld
Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013
Install memory in an iMac - Apple Support
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upgrade advice for a late 2013 27-inch iMac | MacRumors Forums
How To Upgrade RAM on the Apple iMac 2012 - 2013 RAM Upgrade - 21.5 inch model - YouTube
How to Upgrade RAM on MacBook Pro, iMac & More | AVG
Memory upgrade: Apple iMac 2012/2013/2014 (Howto)
