2 Replies Latest reply: Nov 16, 2013 2:38 PM by Grant Bennet-Alder
denverny Level 1 Level 1

Hope this works  as a post   Since installing Maverick, my laptop screen does not appear on my desktop display.   Used it every day before this program  have no idea how to make it work now  I want the larger display when working at my desk  Help!

MacBook Pro, OS X Mavericks (10.9), desktop display fine before upgrade
  • sterling r Community Specialists Community Specialists

    Hey there Denverny,


    It sounds like you have an external display that is not functioning correctly after updating to Mac OS X 10.9.

    I want to recommend the steps in this article named:

    Apple computers: Troubleshooting issues with video on internal or external displays


    No video or no signal, image distortion, "snow," or flickering

    Check connections

    When using an external display be sure to check the following:

    1. If you're using an Apple notebook, confirm the AC power cable or adapter is securely connected to the computer and the cable providing power to the display is also secure. It is always good to have your notebook connected to AC power when an external display is in use.
    2. Confirm display adapters are fully seated in their respective connections and that they are supported models and for the computer and display. Refer to these articles to assist you with adapter compatibility and further configuration information:
    3. Remove all display cable extenders, KVM switches, or other like devices and retest to determine if the issue is resolved.
    4. Try unplugging the video adapter or cable and then plug it back in.
    5. If more than one video adapter is in use (or "daisy-chained"), troubleshoot by using only one adapter.
      • Example: A mini DisplayPort to DVI adapter connected to a DVI to HDMI adapter is an unsupported configuration because there is a series of adapters in use.
    6. If available, try using a different display and or adapter (or use a different connector by using DVI instead of VGA, for instance).

    Reset the systemYou can reset the Mac's parameter RAM and SMC.Reset the resolutionStart by resetting the Mac's parameter RAM. If the display does not come up, was previously set to an unsupported resolution, and still results in no video:

    1. Start up in Safe Mode.
    2. From the Apple () menu, choose System Preferences.
    3. Choose Displays from the View menu to open the preferences pane.
    4. Select any resolution and refresh rate that your display supports.
    5. Restart your computer.


    Thank you for using Apple Support Communities.

    All the best,


  • Grant Bennet-Alder Level 9 Level 9

    You may need to use


    System preferences > Displays > Arrange ...


    ... to set the display modes [again] the way you like.




    Mavericks has added an additional set of display modes to what was present in previous Mac OS X. In Mission Control:


    If you use the Spaces feature and have multiple displays, you can set up separate spaces for each display.