HT204928: About the OS X Yosemite v10.10.4 Update

Learn about About the OS X Yosemite v10.10.4 Update
Ponyboy47
Level 1 (0 points)

Q: External monitors

I have an external monitor that worked perfectly until I updated to OS X 10.10.4. Now the monitor just says "No Signal" whenever I turn it on or plug it in. I have it plugged in to one of the thunderbolt display ports on my Macbook Pro (Late 2013)

MacBook Pro with Retina display, OS X Yosemite (10.10.4)

Posted on Jul 4, 2015 11:01 AM

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Ponyboy47

Q: External monitors

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  • by EarthBased,

    EarthBased EarthBased Jul 6, 2015 10:17 AM in response to Ponyboy47
    Level 1 (29 points)
    Mac OS X
    Jul 6, 2015 10:17 AM in response to Ponyboy47

    Disconnect external monitor and make sure it powers on OK.  If so, use a different Display to Computer cable as the one you are using may be bad.

  • by Mbombley,

    Mbombley Mbombley Jul 27, 2015 2:31 PM in response to Ponyboy47
    Level 1 (0 points)
    Jul 27, 2015 2:31 PM in response to Ponyboy47

    Same issue here.  it is NOT an issue with the display or cable.

     

    the external monitor was working perfectly, then i did the update, now the external monitor is no longer detected.

     

    it is very frustrating that an update designed to "Addresses an issue that prevented some external displays from functioning properly" ends up causing that exact issue to occur.

     

    i may switch over to the public OS beta to see if that fixes the issue. 

     

    MacBook Pro (Retina, 15-inch, Mid 2014), ViewSonic VA2702w monitor, connected via thunderbolt adapter to DVI.

  • by Baefild,

    Baefild Baefild Jul 28, 2015 8:13 PM in response to Mbombley
    Level 1 (0 points)
    Jul 28, 2015 8:13 PM in response to Mbombley

    Same Problem. Same Circumstances. MacBook Pro (13-inch, Early 2011)

     

    baefild