on page 39 of the pdf available here: https://progit2.s3.amazonaws.com/en/2016-01-16-e468b/progit-en.996.pdf Here is the stack overflow discussion: http://stackoverflow.com/questions/34862622/system-wide-config-variables-do-not-work-on-mac-os-x/34862809?noredirect=1#comment57466913_34862809 I think changing /etc/gitconfig to [path]/etc/gitconfig or similar would make more sense.