How to Install a 2.5-inch SSD in the SSD Drive Bay of a 21.5-inch iMac (Mid 2011) iMac12,1 - YouTube
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How-To: Now's the right time to swap your old iMac's hard drive for a fast new SSD - 9to5Mac
How to add a fast new SSD to your old Mac or MacBook for only $150 - 9to5Mac
Replace your 2009-2012 MacBook Pro HD with an SSD
OWC Internal SSD DIY Kit for Apple iMac 27" OWCDIDIM27SSD11 B&H
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Amazon.com: OWC 500GB 3G SSD and HDD DIY Complete Bundle Upgrade Kit for Late 2009-2010 iMacs, (OWCKITIM09HE500) : Electronics
A-Tech for Apple 6GB Kit (1x2GB + 1x4GB) DDR2 667MHz PC2-5300 200-pin SODIMM for MacBook (Late 2007, Early 2008, Early 2009), MacBook Pro (Mid 2007, Early 2008), iMac (Mid 2007) - Memory RAM Upgrade at Amazon.com