Looks like Apple just released OS X 10.9 Mavericks, and I'm thinking about upgrading from 10.8 Mountain Lion. I'm running Rails 3.2.15 with Ruby 1.9.3.
I have several things to potentially upgrade, and they're not necessarily related:
OS X 10.8 --> 10.9
Rails 3.2 --> 4.0
Ruby 1.9.3 --> 2.0
What is the timing cycle usually like for new gems, etc to cooperate nicely with OS X? Is it better to wait a week, or a month, or several months? Or would it be pretty seamless to upgrade OS X and then upgrade Ruby + Rails?