For me, I had to select "mirror display" or something similarlly named in the Display Prefs. On Oct 17, 2013, at 11:32 AM, Dan Currie <dancurr at frontiernet.net> wrote: > Hello, > > I have a MacPro desktop, 2.66 Quad core Intel Xeon, 8 GB DDR3, running OS 10.8.5. > > I bought a 25' vga cable with sound connections. I plugged it into the DVI pigtail and connected it to my HD TV through the vga/sound connection ans selected PC for the input to the TV. > > No picture/sound on TV. "SIGNAL NOT DETECTED" > > When I went to SysPref and clicked Display there is NO "AUTO DETECT" for the TV and it does NOT show up in the list of DISPLAYS. > > Was told this was a simple plug and view ... HELP!!! > > Thanks! > > Dan Currie > > _______________________________________________ > X4U mailing list > X4U at listserver.themacintoshguy.com > http://listserver.themacintoshguy.com/mailman/listinfo/x4u