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iMac (27-inch, Late 2012) - Technical Specifications
32GB PC4-21300 RAM for Apple iMac 2020 - 27 Inch Retina 5K MXWV2LL/A - MXWV2xx/A
iMac (27-inch, Late 2012) - Technical Specifications
NEMIX RAM 32GB Kit (4x8GB Upgrade) DDR3-1600 SODIMM PC3-12800 for Apple MacBook Pro Mid 2012 / iMac Late 2012 / iMac 2013, Late 2014, Mid 2015, Mac Mini Late 2012 at Amazon.com
Apple 27" iMac with Retina 5K Display (Intel Core i7, 32GB RAM, 1TB HDD, Late 2014) (Used) - Walmart.com
Can I put 32GB ram on my iMac when max is 16GB? | MacRumors Forums
27" iMac 32gb RAM 1TB SSD late 2012 for Sale in Seattle, WA - OfferUp