Why Can't I Install Rails on Lion Using Rvm

Using rvm bundle install doesn't install rails

I'll bet your RVM isn't set up correctly and /usr/bin/ appears in your PATH before RVM's bin directory. Run echo $PATH to confirm.

If so, back up your dotfiles for safety and run rvm get head --auto and it should put your PATH right. Logout and log back in or source your dotfiles (source ~/.bash_profile or whatever) and try again.

Can't install Ruby under Lion with RVM – GCC issues

This answer was edited multiple times and now contains several alternative solutions. Try the simple “Edit 3” solution first.

Ruby 1.9.3-p125 and later have official support for clang, so if you are installing such a version you should not need GCC. If you’re installing an older version of Ruby, read on.

To compile Ruby with GCC, you need a non-LLVM version of GCC, which is no longer included with Xcode 4.2. Install it yourself (or downgrade to Xcode 4.1 temporarily), then do CC=/usr/local/bin/gcc-4.2 rvm install 1.9.3 --enable-shared (substituting the path to your non-LLVM gcc).

Edit: https://github.com/kennethreitz/osx-gcc-installer/downloads may help for installing GCC. There is also some info available by running rvm requirements.

Edit 2: For an easier solution, you can try adding --with-gcc=clang to the arguments to configure for Ruby to use clang instead of GCC.

Edit 3: rvm install 1.9.3 --with-gcc=clang does that for you.

Note: With current versions of Xcode you need to install the command-line tools separately from the Xcode menu -> Preferences -> Downloads -> Components. This is a pre-requisite for doing any compiling with Xcode on the command-line, not just Ruby.

Note 2: If something doesn't work after following the steps, try doing a reboot or re-login to ensure that the environment gets set correctly.

Note 3: Ruby versions prior to 1.9.3-p125 may not always be fully compatible with clang, so test your software thoroughly if using the “edit 3” solution in a production environment.

trouble with zlib and rvm on OS X Lion

I was having the same problem. I finally ran

rvm implode

then reinstalled with this official walk through.

https://rvm.io/rvm/install/

gems and RVM work fine for me now. Implode will completely remove your install of RVM.

Can't install Ruby Enterprise Edition with RVM on OSX Lion

I was able to duplicate your error, just now. This solved it for me:

$ rvm remove ree

$ export CC=/usr/bin/gcc-4.2

$ rvm install --force ree

Mac OS X Mountain Lion Rails is not currently installed on this system.

Use RVM http://rvm.io or rbenv to install newer Rails versions than what come pre-installed with OS X.

Follow examples on the site https://rvm.io/rvm/install/ but basically:

Install RVM: $ \curl -L https://get.rvm.io | bash -s stable

You can then $rvm list known to see what Rubies are available to you (lots). And simply $rvm install 1.9.3 to get the most current version of Ruby (which as of this writing is ruby-1.9.3-p327)

Set that ruby as your default $rvm --default use 1.9.3

Create a default gemset to store your gems $rvm use 1.9.3@mygemset --create --default

Then install Rails $ gem install rails will get you current which today is same as typing gem install rails -v 3.2.9

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