Mac OS X package distribution version works great,
but logs will never been output to a file or standard output.
I'm also using a rpm version, and that does into /var/log/jenkins/jenkins.log.
A log file is very useful to check what jenkins currently does.
So, I suggest to let Mac OS X package version log to /var/log/jenkins/jenkins.log
I've known that it's because of launchd plist file, which is not configured to output StandardOutPath/StandardErrorPath to a file.