Q: Projector will not detect iMac that is already on
For years I have used all of my older iMacs to run projection in my facility ranging from a G5 to as recently as 2011 Intel iMacs. I left those computers on most of the time as they were used throughout the week. When the associated projectors (connected via display port and then mini display port to VGA) were turned on, then they detected the iMac that was connected and running (FYI - this worked through Yosemite on all recent machines).
I recently purchased two newer iMacs. One in 2014 and another in 2015. It has been an issue since that when the projector is started that it does not detect the computer that is running and connected. The mini display port cable has to be unplugged or the computer has to be rebooted for the projector to detect it. Since this has never been a problem in the past, I am wondering if there is a setting or something I can change? I have tried a variety of things but at this point just want to ask if anyone else has come across a solution.
Thanks -
Craig
iMac, OS X Yosemite (10.10.5)
Posted on Aug 25, 2015 12:13 PM