直接贴方法：
1.一条命令搞定
/Library/Application Support/Jenkins/Uninstall.command
2.或着 逐条执行
sudo launchctl unload /Library/LaunchDaemons/org.jenkins-ci.plist
sudo rm !$
sudo rm -rf /Applications/Jenkins "/Library/Application Support/Jenkins" /Library/Documentation/Jenkins
sudo rm -rf /Users/Shared/Jenkins
# if you want to get rid of all the jobs and builds:
sudo dscl . -delete /Users/jenkins
# delete the jenkins user and group (if you chose to use them):
sudo dscl . -delete /Groups/jenkins
