Jenkins does not start on macOS 10.12 (Sierra)

Question

After upgrading my macOS to Sierra, when I start Jenkins using launchctl load I cannot connect to localhost:8080. If I call launchctl load again, I see response \"service alread

Answer 1

This happened to me when I upgraded to Sierra and I managed to solve it with the answer from @mac.slusarek . But it happened again recently. This time I had allowed a minor update of the OS and I had also been playing around with SDK Man to switch JDK's. Not sure which one broke my Jenkins but this time around it was not a permissions issue.

I noticed from the logs Jenkins was trying to run on Java 9-ea, which is apparently not supported yet. I had installed Jenkins using the Jenkins installer for Mac, so tried uninstalling:

/Library/Application\ Support/Jenkins/Uninstall.command

and installing again but the issue didn't go away.

Then I found this article suggesting to instead install it using Homebrew. It was as easy as running:

$brew install jenkins

Since I only run it locally for development I don't need to start it as a daemon, so now I just run it by typing

$jenkins

Problem solved. I hope this helps others.

Answer 2

I had the same problem.

I manually enabled the read + write access to the

/Users/Shared/Jenkins 

Folder.

Answer 3

As I mentioned in the question, I had JRE installed. After I installed JDK, Jenkins is able to start normally.