iMac Intel 21.5" EMC 2544 (Late 2012) SSD Enclosures
Parts that work with iMac Intel 21.5" EMC 2544 (Late 2012):
OWC Envoy Pro External SSD Enclosure (Mid 2012 and Early 2013 Macs)
Make your factory installed Apple SSD into an external SSD drive. Transfer data to a newly installed internal SSD or keep the original drive as added external storage.
In November 2012, Apple upgraded the 21.5" iMac. From the front this machine looks similar to the edge-to-edge glass face of its predecessor, but the new rear aluminum case tapers to a mere 5 mm at the edges. Laminated to the cover glass is a 1920x1080 16:9 widescreen IPS display. External ports include four USB 3.0, two Thunderbolt, and Gigabit Ethernet. Late 2012 models feature quad Core i5 and i7 processors.