I want to start up the Jenkins service installed on my mac automatically while system reboots after power loss. Can anyone please suggest to me how we can restart Jenkins automatically.
The OS X installer provided for Jenkins will create a service to start it automatically after reboot.
The service uses launchd to run a scheduled job that checks whether Jenkins is running and starts it if not. There are a couple of links to further details at the top of the Jenkins Wiki page, but this page may be a better overview for you.