I have a mid 2010 IMac and I occasionally would like to use it as a second monitor for my windows 10 PC with a GTI 670 Graphics Card. The card has 2 DVI outputs and an HDMI output. I've been hoping to connect DVI-D cable to my PC and a MiniDisplay Port Adapter plugged into the IMac to do this. After connecting, my IMac doesn't appear to respond to CMND-F2, (with or with out the FN key), when I do a spotlight search for Target Mode it opens up my Startup Disk and it doesn't see any drives, and it gives me 2 options. (Restart...) and (Target Disk Mode...). Where am I going wrong?
Did apple truly kill this feature?
http://www.forbes.com/sites/bradmoon/2015/10/18/apple-quietly-killed-off-one-of- the-imacs-best-features/#152242373f2e
El Capitan
10.11.2
iMac 27" Mid 2010
8 GB Ram 1333 MHz DDR3
ATI Radeon HD 5750 1024 MB
Windows 10 Pro 64bit PC
3.20 gigahertz Intel Core i7-3930K
NVIDIA GeForce GTX 670
32 GB Ram
iMac (27-inch Mid 2010), OS X El Capitan (10.11.2), Windows 10 64bit
