iMac Intel 21.5" EMC 2638 (Late 2013) SSD Enclosures
Parts that work with iMac Intel 21.5" EMC 2638 (Late 2013):
OWC Envoy Pro External SSD Enclosure (Mid 2013 to Mid 2015 Macs)
Make your factory installed Apple PCIe SSD into an external SSD drive. Transfer data to a newly installed internal SSD or keep the original drive as added external storag...
In September 2013, Apple upgraded the 21.5" iMac, but externally the new model is nearly indistinguishable from the Early 2013 model. Laminated to the cover glass is a 1920x1080 16:9 widescreen IPS display. External ports include four USB 3.0, two Thunderbolt, and one Gigabit Ethernet port. Wireless connectivity includes Bluetooth 4.0 and 802.11ac Wi-Fi.