MilesH

Q: New Mac Pro, Multiple displays not all coming on at startup

New Mac Pro cylinder (late 2013 model) 8 core, 3 GHz, 64 GB Ram

OSX 10.10.1 Yosemite

3x Apple 23" Cinema Displays: 2 connected using dual link DVI to TB adapters, 1 connected using single link dvi to tb adapter

1x Sony HD TV using HDMI

 

I have a 4 monitor setup on my new Mac Pro.  3 Cinema Displays and a HD TV. 

 

All monitors are correctly connected per Apple instructions, spread across the TB busses as directed, and using the necessary adapters as indicated:

Mac Pro (Late 2013): Using multiple displays - Apple Support

 

The monitors do not all boot up when I boot up the system.  Several remain black/inactive, while 1 or two come on.  It's trial and error, I have to restart the computer over and over again until they all come on.  Eventually they do, but only after multiple restarts, every day.  And it's always different.   I've tried turning off a couple of the monitors at boot then turning them on after boot, sometimes that works better but not always.  Always requires at least 2 restarts, today it took 6 before they all came on.  No rhyme, no reason. 


Known issue, a colleague with similar multi-monitor setup reported the issue to me before I purchased the MP.  It's a bug/glitch in the new mac pro design/TB busses I assume. But wondering if there is a way to make it work every time as it should.


Never an issue using this 4 monitor setup on previous mac pro under any OS.  All displays and adapters work fine.


Any help is appreciated, thanks.


Posted on Jan 8, 2015 1:29 PM

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Q: New Mac Pro, Multiple displays not all coming on at startup

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  • by RyArchMAn,

    RyArchMAn RyArchMAn Jun 9, 2016 8:29 AM in response to MilesH
    Level 1 (4 points)
    Desktops
    Jun 9, 2016 8:29 AM in response to MilesH

    My tremendous thanks for posting your issue here. I've been having the same trouble on and off for months now. Each time Apple's support team tells me they are stumped and escalates the issue to their "engineers". Never to be heard from again.

     

     

    The culprit seems to be these two files on my system:

    com.google.keystone.agent.plist

    com.google.keystone.daemon.plist

     

    They were removed from:

    /Library/LaunchAgents

    /Library/LaunchDaemons

     

    I also removed a couple CleanMyMac folders as well, but I'm unsure if these had anything to do with that.

     

    Both monitors I have connected are both working now.

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