Step-by-step Guide to Use iMac as an External Monitor for PC/Mac
Repurposing an Older iMac As a Monitor and Server - Stephen Foskett, Pack Rat
Is it possible to extend a late 2013 iMac to an external display? - Quora
iMac 27-inch (2013) Review | Trusted Reviews
Use an iMac as an External Monitor - YouTube
Can someone tell me what is broken here ? This is my late 2013 IMac. It stopped showing things a couple days ago but an external Monitor shows everything. The screen is
Old iMac as a monitor - instructions for screen synchro »Sir Apfelot
Differences Between 2013/2014 iMacs and Late 2015 iMacs: EveryMac.com