Sabrent Premium 4-Port USB 3.0 Hub for iMac (2012 and later)
All New iMac Released: Specs & Pricing | OSXDaily
New Apple iMac (2012) 21.5": Unboxing & Demo - YouTube
By the numbers: Apple's new iMac vs. the Windows 8 all-in-one competition - The Verge
Amazon.com: Hagibis iMac Hub with 4K@60Hz HDMI, USB C 3.1, USB 3.0 Ports and SD/Micro SD Card Reader, USB-C Clamp Hub USB C Docking Station for 2021 iMac 24 inch (with HDMI) :
iMac 2012 Retina Review | Trusted Reviews
iMac | 3.4 GHz Intel i7 | 27 Inch | Late 2012 - Techable.com
iMac 2012 - Test de velocidad puerto USB 3.0 - YouTube
Apple iMac 27" - Late 2012 Reviews, Pros and Cons | TechSpot
Best USB 3/USB-C Hubs for Aluminum iMac Tapered Edge: EveryMac.com
Apple iMac 21.5-inch (December 2012) review: The smaller iMac Windows PCs can pick on - CNET
iMac 21.5-inch Late 2012 – Full Tech Specs, Release Date, and Price
Apple 21.5 inch iMac Unboxing & Demo (Late 2012) - YouTube
iMac (27-inch, Late 2012) - Technical Specifications
Review: 21.5-inch 2012 iMac takes two steps forward, one step back | Ars Technica
iMac (fine 2012 e versioni più recenti): funzioni, porte e connettori esterni - Supporto Apple (IT)
Sabrent Premium 4-Port USB 3.0 Hub for iMac (2012 and later)
USB 3.0 Port Extender for iMac
Apple iMac review (2012) | Engadget
Apple iMac 27-inch (Late 2012) - Review 2012 - PCMag UK
increasing USB ports on iMac late 2012? | MacRumors Forums