How to fix a Mac USB port that isn't working - Macworld UK
Satechi Type-C Aluminum Monitor Stand Hub for iMac - Docking station + monitor stand - USB-C - for Apple iMac (Early 2019, Late 2009, Late 2011, Late 2012, Late 2013, Late 2014,
Identify your iMac model - Apple Support
iMac | 2.7 GHz Intel i5 | 21.5 Inch | Late 2013 - Techable.com
Apple iMac (27-inch, September 2013) review: New processors and faster Wi-Fi for Apple's slim desktop - CNET
External SSD on Late-2013 27" iMac | MacRumors Forums
Identify your iMac model - Apple Support
iMac 27" 3.5GHz (Late 2013) | mac of all trades
21.5-inch iMac (Late 2013) Review: Iris Pro Driving an Accurate Display
Apple iMac 21.5-inch 2.9GHz Quad-core i5 (Late 2013) ME087LL/A | mac of all trades
iMac (27-inch, Late 2013) - Technical Specifications
Great way to add USB-C to 2013 Mac Pro | MacRumors Forums
Apple iMac 27" - Late 2013 Reviews, Pros and Cons | TechSpot
WiFi, IO & The Chassis - 21.5-inch iMac (Late 2013) Review: Iris Pro Driving an Accurate Display
iMac (21.5-inch, Late 2013) - Technical Specifications
Apple 27-Inch iMac (Late 2013) Review, Haswell Inside | HotHardware
iMac (late 2013) boot from usb slow | MacRumors Forums