Apple 27" iMac 8GB 1TB 2011/12 High Sierra | Laptop Workshop
Identify your iMac model - Apple Support
Installing macOS High Sierra on Late 2011 MacBook Pro - YouTube
Apple iMac 21.5" All-in-One Desktop Computer i3 3.07GHz 4GB Ram 500GB HDD Mac OS High Sierra MC508LL/A w/ Keyboard & Mouse
Apple iMac (A1312) 27 Inch High Sierra Intel 2.7Ghz i5 1TB HDD 16GB RAM Mid 2011 | eBay
MacOS High Sierra Compatible Macs List | OSXDaily
Apple iMac 21.5" AIO Desktop Quad Core i5 2.5GHz 8GB 500GB Sierra Mac OSX ( 2011) and WIFI
SOLD - Mid 2011 iMac 21.5" - $495 - Denver Mac Repair
Apple iMac 21.5” Mid 2011 - 2.8Ghz i7 - 12GB - 2TB!!! - High Sierra 10.13.6 | eBay
Apple iMac 27″ Mid 2011 Core i5 3.1GHz 16GB 1TB DVDCDRW Wifi macOS 10.13 High Sierra – Refresh Computers Online Marketplace
I just bought a 2011 21.5" imac and reinstalled High Sierra. I then noticed these graphical issues. I hope the gpu isn't going out. Does anyone know what's going on? : r/mac
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