I installed this: http://www.macrumors.com/2015/01/27/apple-os-x-10-10-2/
And Sonarr would no longer run. I re-installed it, and now have 2.0.0.2722 running, but when I go to System / Updates, it shows that the latest is 2.0.0.2713 (older than what I currently have running).
Doesn’t seem to be causing any issues, but weird.
Jon