iMac Intel 21.5" EMC 2638 (Late 2013)
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.