OS-X, Rails: “Failed to build gem native extension”

Question

I\'m stuck trying to install rails on my mac. I have OS X 10.6.8 and I have confirmed that I have Ruby, version 1.8.7

I ran sudo gem update and su

Answer 1

The Command line tools didn't solve this issue for me. I upgraded ruby installation through rbenv to 2.2.0, made that the global default ruby installation, and this issue was fixed.