Any known problems with Ruby/Rails in Lion -> Mountain Lion upgrade?

Question

I am currently running OSX Lion on my Mac and I do a lot of Rails development.

I am wondering if upgrading my system to OSX Mountain Lion is going to really mess up my Rails/Ruby work. I run Ruby off of RVM.

Answer 1

I'm not sure about Ruby or Rails development specifically, but here's some things I had to do after upgrading to 10.8. See also this question and this blog post.

• I had to install the command line tools package from Xcode's preferences. Xcode no longer includes separate binaries of the LLVM compiler or make or utilities like SetFile by default.
• X11.app is no longer installed by default. Some Homebrew formulas required installing XQuartz.
• Configuration files in /etc/apache2/ were removed or overwritten. See this question.
• ImageMagick didn't work until I uninstalled and installed it again with Homebrew.