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Under review

MacOS - All windows are white and non functional without physical display

Jason G 12 months ago updated by Absolute 8 months ago 3

Machine I am accessing - MacMini

Client version: 19.3.25169.7170\

Operating System:Apple Inc., Mac OS X (10.14.6) (en_US)

Processor(s):Intel(R) Core(TM) i3-8100B CPU @ 3.60GHz (4 virtual) (X64)

Machine I am accessing from: Windows 10 ThinkPad RS5. Software version 19.3.25169.7170

When I access my MacMini using ScreenWise, all windows on the MacMini appear white.  There is one large mystery window that does not seem to be an actual window - perhaps a hidden overlay from ScreenConnect?  I cannot close the mystery window.  Other windows I can blindly interact with, though I cannot see what I am doing.

If I plug a display into the MacMini, the problem instantly goes away. In my case, I am using a USB-C -> VGA converter.  When I have the physical display connected, the mystery window is not visible. If I unplug the display, the problem occurs again.  After doing this 1 or 2 times, the problem will not re-occur until after OS sleep/resume.  

From the same Windows ThinkPad I am able to successfully work with other remote agents, but all are Windows based.  I only have 1 MacOS device, and it exhibits this problem.

Screenshot: 

ConnectWise Control Version:
20.7
Server Affected:
Host Client Affected:
Guest Client Affected:

I am having same issue, running MacMini headless as well. Same Client version on Mac, though Mac is Late 2014 i7-4578U running 10.14.6. Accessing from Windows 10 as well. I have not been able to test with monitor plugged in as I am remote though.

We have a tech bulletin on this issue. Unfortunately there is no known solution as this time in Control and other remote support tools. Attaching a monitor, display emulator, or headless Mac video accelerator will employ the video adaptor and allow the screen to be displayed properly.  

We had exactly the same problem until we bought a cheap  'Dummy HDMI' adaptor by FUERN. That fixed the problem 

BTW we also had an issue with Apple's own RDC not working properly, again the adaptor fixed it.


HDMI dummy plug,Headless Ghost, Display Emulator (Fit Headless-1920x1080 New generation@60Hz)