Repurposing an Older iMac As a Monitor and Server - Stephen Foskett, Pack Rat
Looking to connect a mid 2011 iMac to an external monitor, these are my connections available. What are my options? : r/applehelp
Old iMac as a monitor - instructions for screen synchro »Sir Apfelot
2009-2011 27" iMac as an external display | MacRumors Forums
That's my 2011 iMac. It's been heavily used for rendering sometimes for days without ever stopping but it is still holding up great. Never had to repair anything it's the most reliable
Apple Thunderbolt Display with Multiple Monitors: No Daisy Chaining Mini DisplayPort Monitors [Updated] - MacRumors
Turning a 27" 2011 iMac into an external QHD Display with a Juicy Crumb Dock Lite - YouTube