/usr/bin/marco-no-composite is in mate-tweak 3.5.10-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 | #!/usr/bin/env bash
WM=marco
if [ ! -x $(which ${WM}) ]; then
echo "ERROR! Can't find ${WM}."
exit 1
fi
# Replace window manager and force compositing off.
${WM} --no-composite --replace &
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