Mountain Lion (10.8) has three main difference compared to Lion (10.7):
- XCode 4.4 does not install Command Line Tools by default
- X11 isn't available anymore
- The installed version of OpenSSL has some bugs
Mountain Lion supports only XCode 4.4 or greater. Basic 4.4 installer doesn't install Unix's standard command line tools by default. You have to install it using separate package (from Apple Developer's) or directly from XCode 4.4 preference panel (Preferences : Downloads : Components : Install).
When installation is complete, tools are finally available but is not enough. Unfortunately llvm_gcc-4.2 compiler ship with XCode is not suitable to compile Ruby (it works but some features are buggy).
You have to install the stand-alone gcc package. You can use:
sudo port selfupdate sudo port install apple-gcc42
brew update brew tap homebrew/dupes brew install apple-gcc42
Now you have Unix's standard command line tools (and stuff like git and svn come back to work) and a stand-alone version of gcc-4.2.
Now it's time to compile your Ruby version using one of the following commands (latest version of last major releases):
CC=/opt/local/bin/gcc-apple-4.2 rvm install ruby-1.8.7-p370 --enable-shared --without-tk --without-tcl
CC=/opt/local/bin/gcc-apple-4.2 rvm install ruby-1.9.2-p320 --enable-shared --without-tk --without-tcl
CC=/opt/local/bin/gcc-apple-4.2 rvm install ruby-1.9.3-p194 --enable-shared --without-tk --without-tcl
If some of these version are already installed you have to run
rvm remove followed by the ruby version or use
rvm reinstall command instead
CC=/opt/local/bin/gcc-apple-4.2 force installer to use stand-alone version of gcc (I use the MacPorts one,
/opt/local/bin/ is standard MacPorts path).
--without-tk --without-tcl options disable Tcl/Tk libraries that require X11 (i didn't try to compile without these options and connect XQuartz).
REE installer require a working C++ compiler but can't recognize the
g++ command because looks for
g++-4.2. You can fix this bug creating a symbolic link to
ln -s /usr/bin/g++ /usr/bin/g++-4.2
Then you can run following command like the other releases
CC=/opt/local/bin/gcc-apple-4.2 rvm install ree-1.8.7-2012.02 --enable-shared --without-tk --without-tcl``
X11 is not required in order to install Ruby but if you use stuff like ImageMagick (and rmagic) you need it.
The easier way to have X11 on OSX 10.8 is to use XQuartz (http://xquartz.macosforge.org) available in a comfortable
When you try to connect to a secure server using https standard library you get the following error:
Errno::ECONNRESET Connection reset by peer - SSL_connect
The problem seems to be related to OpenSSL version 1.0.1.
I can't find a solution that works for me yet but some people was able to fix it using the following option when they compile Ruby: