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Install memory in an iMac - Apple Support
How-To: Boost your Mac's speed and prolong its useful life with easy RAM upgrades - 9to5Mac
How to Upgrade the RAM in Your iMac
Install memory in an iMac - Apple Support
Install memory in an iMac - Apple Support
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How to Upgrade iMac RAM (21.5" and 27" Aluminum): EveryMac.com
How to Upgrade the RAM in Your iMac
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iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
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