Identify your iMac model - Apple Support
iMac 21.5-Inch "Core i5" 2.5 (Mid-2011) Specs (Mid-2011, MC309LL/A, iMac12,1, A1311, 2428): EveryMac.com
Review: 21.5-inch 2012 iMac takes two steps forward, one step back | Ars Technica
Amazon.com: HumanCentric VESA Mount Adapter for iMac 24 Inch (Aluminum), iMac 27 Inch (2009, 2010, 2011), LED Cinema Display, Thunderbolt Displays, Replaces Apple iMac VESA Adapter MD179ZM/A, iMac VESA Kit : Electronics
Apple iMac A1311 21.5" Desktop MC309LL/A (May, 2011) for sale online | eBay
661-7190 Apple Thunderbolt 0.5m Cable, A1418 A1311 A1398 A1425 A1419 A1312 for MacBook Pro
Amazon.com: Mini DisplayPort to HDMI Adapter for iMac Mid 2011(27-inch, 21.5 inches) Mini DP (Thunderbolt) to HDMI Adapter Compatible with MacBook Air/Pro, Microsoft Surface Pro/Dock, Projector and More 1-Pack : Electronics
Apple publishes Thunderbolt support documents - 9to5Mac
Using an iMac as a Monitor in Target Display Mode
Target Display Mode And Thunderbolt
Apple iMac 21.5-inch (Thunderbolt) - Review 2011 - PCMag UK
iMac | 2.7 GHz Intel i5 | 21.5 Inch | Mid 2011 - Techable.com
Take a tour: 21.5-inch iMac and 27-inch iMac - Apple Support
Apple iMac MC812B/A (2011) Review | Trusted Reviews
Where is the Mini DisplayPort in the New … - Apple Community
iMac (21.5-inch, Mid 2011) - Technical Specifications
iMac notes: Dual external monitors, touchpad and SSD options - 9to5Mac
Apple updates iMacs with Sandy Bridge processors, Thunderbolt ports, FaceTime HD camera and more - 9to5Mac
Sold - 21.5" iMac Mid 2011 // $495 - Boulder Mac Repair
FACETIME WEBCAM CAMERA - iMac 21.5 A1311,27 A1312 2011,Thunderbolt Display A1407 | eBay
Apple iMac 21.5" All-in-One Desktop Computer i5-2500s 2.7GHz 8GB Ram 1TB Mac OS High Sierra MC812LL/A w/ Keyboard & Mouse
Identify your iMac model - Apple Support
USB 3.0 for iMac mid 2011 | MacRumors Forums
Teardown of Apple's 21.5-inch Thunderbolt iMac finds removable graphics board | AppleInsider
Identify your iMac model – Apple Support (AU)
Is a Thunderbolt 3 cable compatible with a mid-2011 iMac? - Quora
