Apple iMac (Late 2012, Late 2013) - Manual (Page 4)

AC power cord
Power button
Headphone
Plug in headphones
or external speakers
USB 3
Charge devices,
connect external
storage, and more
Thunderbolt
Connect external displays
and high-performance devices
SDXC
Transfer photos from
your camera’s memory card
Gigabit Ethernet
Connect to the
Internet or a
local network
To learn more about ports and connectors, go to support.apple.com/kb/HT2494 .