cf should fail to install or report error when run on unsupported ruby

[jgfoster]

So it mostly (but not completely) works on a brand new Mac OS X 10.8 (Mountain Lion comes with ruby 1.8.7-p358)?

[andypiper]

I believe it requires 1.9.x minimum. I always install rvm on OS X first.

[tlang]

Update: we're going to cut a new cf gem in a few days that will show an error if running < ruby 1.9.3

[TildeWill]

Done. Minimum Ruby version is 1.9.3. you may also want to update your rubygems to latest if you get an error about modifying a frozen string:
gem update --system