Force RGB on MacOS

fix_rgb.sh

#!/bin/bash

fix_rgb() {
  fixes=0
  dryrun=false

  if [ ! -t 0 ]; then
    read -p "Do you want to proceed with fixing? (y/n): " answer
    if [ "$answer" = "n" ]; then
      dryrun=true
    fi
  fi

  for plist in /Library/Preferences/com.apple.windowserver.displays.plist ~/Library/Preferences/ByHost/com.apple.windowserver.displays.*.plist; do
    original=$(mktemp)
    patched=$(mktemp)

    cp "$plist" "$original"
    plutil -convert json "$original"
    jq --argjson LinkDescription '{"Range":1,"BitDepth":8,"EOTF":0,"PixelEncoding":0}' '( .. | select(.CurrentInfo?) | .LinkDescription ) |= $LinkDescription' "$original" > "$patched" 2>/dev/null

    echo 'null' | jq --argfile original "$original" --argfile patched "$patched" 'if $original != $patched then halt_error(99) else empty end'

    if [ ! $? -eq 0 ]; then
      filename="$plist"

      if $dryrun; then
        echo -e "$filename need to be fixed"
        diff --color=always --side-by-side <(jq -S '.' "$original") <(jq -S '.' "$patched")
      else
        echo -e "Fixing $filename"
      fi

      fixes=$((fixes + 1))

      if ! $dryrun; then
        plutil -convert binary1 "$patched"
        if [[ "$plist" == "$HOME/"* ]]; then
          cp "$plist" "$plist.bak"
          chflags nouchg "$plist"
          cp "$patched" "$plist"
          chflags uchg "$plist"
        else
          sudo cp "$plist" "$plist.bak"
          sudo chflags nouchg "$plist"
          sudo cp "$patched" "$plist"
          sudo chflags uchg "$plist"
        fi
      fi
    fi
  done

  if [ $fixes -gt 0 ]; then
    echo -e "$fixes files fixed. Log out BEFORE rebooting your Mac to apply changes."
  else
    echo "Your Mac is already set."
  fi
}

fix_rgb