Actualización de RAM y Disco duro SATA de Mac Intel 21.5" Retina 4K Display (2017) - Guía de reparación iFixit
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Refurbished (Good) - Apple iMac 21.5"Â Retina 4K (Late 2015, MK452LL/A) (3.1GHZ Core i5 8GB / 1TB HDD) | Best Buy Canada
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A-Tech 16GB (2x8GB) RAM for Apple iMac Late 2015 27 inch Retina 5K | DDR3L 1866MHz / 1867MHz PC3L-14900 1.35V 204-Pin SODIMM Memory Upgrade Kit at Amazon.com
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Specifications and performance - Apple iMac with 4K Retina display (21.5- inch, Late 2015) review | TechRadar
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