enter image description hereSo the reason I attached a VGA dummy to my mid-2014 retina Macbook is to solve this problem which it did. But now I have a new problem. From time to time, if I try to open a software, it won't appear on my retina screen. It reappears if I unplug the VGA Dummy. However, the problem does not appear consistently. Sometimes if I restart my Mac it disappears, at least for a while. And I am not a hundred percent sure, but it never happens with Chrome, only calendar, texshop or office softwares.

Please help me because this is seriously hampering my ability to work

  • window most likely shows up there. Jun 21, 2020 at 10:32
  • How about getting the issue with the random shutdowns fixed? This is like towing a trailer because when you don’t the rear end gets squirreley and causes you to crash. The fix isn’t to tow a trailer for the rest of the vehicle’s life, it’s to fix the underlying problem!
    – Allan
    Jun 21, 2020 at 20:48
  • @Allan,thanks but I don't know how to fix it. I tried various method including reinstall my OSX,but nothing works except this method. If you have any suggestion, I would really appreciate it.
    – jxhyc
    Jun 22, 2020 at 2:21
  • There are posts here on how to get the “shutdown cause” of the Mac. Run one of the commands found here: apple.stackexchange.com/a/306722/119271 once you have the info, search to see if it’s already been asked. If not Ask a new one and post the details (it’s different from this question altogether). It's possible the problem/fix is cost prohibitive, but then again, so cheap and easy you’ll wonder why you put up with it for so long. I’ll help however I can.
    – Allan
    Jun 22, 2020 at 3:06

1 Answer 1


I assume you use the VGA dummy as a secondary monitor, and most likely you have it configured as your primary monitor. Try this: Open Preferences -> Monitors -> Arrange and drag-n-drop the menu bar to your built-in retina display. Alternatively, you can choose to mirror your screen onto the (non-existent) external monitor, which should absolutely fix the issue.

  • Hi, I have attached the display screen capture(I didn't find the monitors option). Would you please kindly confirm this is the right one?
    – jxhyc
    Jul 3, 2020 at 15:00

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