[charliesome]

Please don't let that tempt you to use system Ruby. You should always build your own, especially on a system like OS X.

System Ruby is not there for you, it's there for the system to make use of (and yes, OS X does ship with quite a few Ruby scripts and a couple of Rails applications). Apple makes no guarantees of keeping this Ruby up to date.

[jrochkind1]

What are the Rails applications OSX ships with? I have never heard of or noticed this before.

[evilduck]

I don't know what "vanilla" OSX ships with, but I've seen references to Rails pop up in logs in Console.app for my OSX Server when I was screwing with replacing their Postgres db with my own.