Fork-without-exec causes problems with Apple's frameworks. Some documented examples of this are here, here, here, and here. We ran into this issue in the linked HELP ticket. For these reasons, we should not be supporting this idiom. Users can replace `mongod [options] --fork --logpath <logfile>` with `nohup mongod [options] --logpath <logfile> >/dev/null &` for similar behavior.