iMac "Core i5" 2.5 21.5" (Mid-2011) Specs (Mid-2011, MC309LL/A, iMac12,1, A1311, 2428): EveryMac.com
Microsoft Office for Mac 2011 Not Supported on macOS High Sierra - The Mac Security Blog
MacOS High Sierra Compatible Macs List | OSXDaily
Apple iMac 27 inch, Mid 2011 macOS High Sierra, 2.7 GHz Intel Core i5, 4GB | eBay
Apple iMac 21.5 Mid 2011 Intel Core i5 2.7GHz 8GB RAM 500GB macOS High Sierra | eBay
Apple iMac 27-inch MC511LL/A (MID 2010). Core i5 @ 2.80GHz. 16GB RAM. 1TB HDD. High Sierra 10.13. for Sale in San Diego, CA - OfferUp
Amazon.com: Apple iMac Mc813ll/a Mid-2011 27" Silver, I5-2500s 2.7ghz (20GB, 2TB HDD) (Renewed) : Electronics
Mid 2011 Apple iMac 21.5" A1311 i5 2.7GHz 8GB RAM 1TB HD OSX Sierra - DCPS Computer Program
Apple iMac 21.5-inch Mid-2011 2.5GHz Intel Core i5 (MC309LL/A) – UNICOM, Inc.
Apple iMac (21.5", Intel Core i5, 4GB, 1TB, High Sierra, 2011, A1312) | eBay
Identify your iMac model - Apple Support
Apple iMac 21.5", Mid 2011, 2.7GHz Intel Core i5, 4GB, High Sierra 1TB SATA HD | eBay
Sold - 21.5" iMac Mid 2010 // $295 - Boulder Mac Repair
Upgrade Mid 2011 iMac 21.5 beyond High Sierra? | MacRumors Forums
Apple 21.5" iMac All in One Desktop Computer Core i5 8GB Ram 500GB HD OS High Sierra and WIFI Keyboard And Mouse - GRADE B
Apple 27" iMac 8GB 1TB 2011/12 High Sierra | Laptop Workshop
How to Update/Upgrade iMac to the latest macOS Sierra - YouTube
