If you are experiencing problems getting new M1 to output RGB colors with external monitors, this worked for me: github.com/sudowork/fix_m1_rgb

Silicon performance is awesome but external monitor bugs have been quite rough.

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I have Dell U3219Q monitor and with every reboot it’s been a mystery which color mode it will end up in… With this script (and deleting “com.apple.windowserver.displays.plist” from my user-specific Library/Preferences folder) it seems to have settled with RGB.

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