Pink screen issue on external monitor (macOS Catalina 10.15.5)

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Chauhv1 Author

Level 1

4 points

Pink screen issue on external monitor (macOS Catalina 10.15.5)

Hello Team,

I am facing issues when connecting 2nd Monitor as its showing pink screen mirrored with 1st Monitor.

1st Monitor works fine only 2nd monitor is having issues.

Troubleshooting Steps done so far :-

1) Updated MacOS to version 10.15.5 (19F101)

2) Tried unplugging and plugging back the cables

I am using docking station to connect to my monitors, If I remove HDMI cable on 1st monitor, 2nd Monitor who was having issues (using VGA adapter) is no longer having any issues

and if i remove VGA Cable then Monitor 1 still works fine.

3) I have a Windows Laptop and it works fine on that

4) I had also tried modifying directory System/Library/Displays/Contents/Resources/Overrides by using video link https://www.youtube.com/watch?v=cDNvpYGIl_4 but that didn't help.

sh-3.2# chmod 777 /System/Library/Displays/Contents/Resources/Overrides/

chmod: Unable to change file mode on /System/Library/Displays/Contents/Resources/Overrides/: Operation not permitted

5) on Display > Arrangement I see only 2 screens ideally there should be 3 I am guessing that could be the crux of the issue.

Please let me know if there is any thing else you like me to try.

Posted on Jun 24, 2020 9:46 PM

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Answer 1

Top-ranking reply

Chauhv1 Author

Level 1

4 points

Jul 17, 2020 4:39 PM in response to Chauhv1

So I was able to resolve this issue by using Different Dock WD 19 instead of WD 15 as Mac doesnt have inbuilt graphics card to support second monitor but Dell WD 19 and D6000 does have that Graphics card to support second or third mornitor.

My monitor is using HDMI and other one USB C to HDMI and I am using WD19TB Dell Dock.

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Answer 2

Chauhv1 Author

Level 1

4 points

Jun 27, 2020 1:05 PM in response to Chauhv1

I think I found my answer MacBook Pro 13 inches can support max two display, I was able to resolve Pink screen issues by using mini display port to HDMI but it was still mirrored.

The issues is with MAC unfortunately.

https://support.apple.com/kb/SP775?locale=en_US#:~:text=Up%20to%20two%20displays%20with%203840%2Dby%2D2160%20resolution%20at,at%20over%20a%20billion%20colors

Video Support

Simultaneously supports full native resolution on the built-in display at millions of colors and:

One display with 5120-by-2880 resolution at 60Hz at over a billion colors
Up to two displays with 4096-by-2304 resolution at 60Hz at millions of colors
Up to two displays with 3840-by-2160 resolution at 60Hz at over a billion colors

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Pink screen issue on external monitor (macOS Catalina 10.15.5)

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