iMac Model A1419 / Late 2012 / 2.9 & 3.2 GHz Core i5 or 3.4 GHz Core i7 - iFixit
Amazon.com: Cateck Ultra-Thin Premium Aluminum 3-Port USB 3.0 Hub with SD/TF Card Reader Combo Exclusively Designed for iMac Slim Unibody : Electronics
iMac | 3.4 GHz Intel i7 | 27 Inch | Late 2012 - Techable.com
Apple iMac A1419 27" Desktop - MD095LL/A (October, 2012) for sale online | eBay
Aluminum Alloy Usb 3.0 Hub 3 Port Adapter Splitter With Sd/tf Card Reader For Imac 21.5 27 Pro Slim Unibody Computer - Docking Stations & Usb Hubs - AliExpress
New Apple iMac (2012) 21.5": Unboxing & Demo - YouTube
Review: 21.5-inch 2012 iMac takes two steps forward, one step back | Ars Technica
Apple iMac 21.5-inch (December 2012) review: The smaller iMac Windows PCs can pick on - CNET
iMac 2012 Retina Review | Trusted Reviews
Sabrent Premium 4-Port USB 3.0 Hub for iMac (2012 and later)