1.先关闭jenkins ;
2:命令行下修改端口：
sudo defaults write /Library/Preferences/org.jenkins-ci httpPort 7071
3：启动jenkins
附：
启动jenkins：
sudo launchctl load /Library/LaunchDaemons/org.jenkins-ci.plist
停止jinkins：
sudo launchctl unload /Library/LaunchDaemons/org.jenkins-ci.plist
