Sometimes works sometimes doesn't.

[pjebs]

On Mac, this approach sometimes works and sometimes doesn't. I can't figure out why.

THis article might explain it:

http://blog.gordn.org/2015/03/implementing-run-on-login-for-your-node.html

I think you need to "load" the job.

This package creates the pList file and places it in the LaunchAgent directory but doesn't do "load" the job.