This question already has an answer here:
I want to know if the list of Time Machine excluded files (pictured below) can be found in a file somewhere.
I know about the question On Lion, what files are excluded by rule from a Time Machine backup? which has a lot of good information about
tmutil – but not the answer for this question.
One answer also talks about
.exclusions.plist, which is almost the answer to this question. But there's a catch, I haven't done a backup yet, so I can't read the
.exclusions.plist file from the Time Machine backup volume.
cd / ; sudo find . -iname "*exclusions*" now, keeping my fingers crossed.