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Workaround the HDR bug of macOS Catalina 10.15.4
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| #!/usr/bin/osascript | |
| tell application "System Preferences" | |
| activate | |
| end tell | |
| tell application "System Events" | |
| tell process "System Preferences" | |
| activate | |
| delay 1 | |
| click menu item "Displays" of menu "View" of menu bar 1 | |
| delay 1 | |
| tell window "LG HDR 4K" | |
| delay 1 | |
| if (exists tab group 1) then | |
| click radio button "Display" of tab group 1 | |
| set HDRCheckbox to checkbox "High Dynamic Range" of tab group 1 | |
| if (exists HDRCheckbox) then | |
| click HDRCheckbox | |
| tell HDRCheckbox | |
| if (its value as boolean) then | |
| delay 15 | |
| click HDRCheckbox | |
| end if | |
| end tell | |
| end if | |
| end if | |
| end tell | |
| end tell | |
| end tell |
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The script is fine, but still I had some issues left; making a custom EDID file and putting this in /S/L/Displays..../Overrides completely disables HDR; so no script to be run and no flickering. This may interest other readers: https://www.tonymacx86.com/threads/10-15-4-update-how-to-disable-hdr-support.293991
However, if you would like to keep HDR as an option, you should use this script. I don't need HDR. Thanks @adriang133