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kosz Author

Level 1

8 points

Catalina 10.15.4 update breaks color calibration and forces HDR

hi everyone

I'm running two screens via CalDigit dock:

4k LG 27UK850-W (display port)
Apple Thunderbolt Display (usb-c via official dongle)

Installed the latest 10.15.4 update yesterday and now the LG screen is working in a very funky way.

macOS forces HDR mode for LG once I plug-in the doc via usb-c (every time).

After disabling the HDR in settings, the color calibration becomes completely broken (very high brightness and contrast) so I have to unplug/plug back the screen to make it work correctly.

Previously everything was woking fine.

Any thoughts or it is a bug?

Thank you

MacBook Pro 15”, macOS 10.15

Posted on Apr 24, 2020 11:56 AM

Top-ranking reply

leroydouglas

Community+ 2024

Level 10

189,222 points

Posted on Apr 25, 2020 6:08 AM

kosz wrote:

• hi everyone

I'm running two screens via CalDigit dock:

4k LG 27UK850-W (display port)

• Apple Thunderbolt Display (usb-c via official dongle)

Installed the latest 10.15.4 update yesterday and now the LG screen is working in a very funky way.

macOS forces HDR mode for LG once I plug-in the doc via usb-c (every time).

After disabling the HDR in settings, the color calibration becomes completely broken (very high brightness and contrast) so I have to unplug/plug back the screen to make it work correctly.

Previously everything was woking fine.

Any thoughts or it is a bug?

Thank you

I have seen other issue similar in using the " CalDigit dock"

I suspect it is bug of sorts.

You can check CalDigit website/help forums for support or updated driver

CalDigit Support Downloads

Support – CalDigit

If you want to file a bug report—Apple Feedback http://www.apple.com/feedback

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Catalina 10.15.4 update breaks color calibration and forces HDR

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