How to use/install gcc on Mac OS X 10.8 / Xcode 4.4 – Dev

The best answers to the question “How to use/install gcc on Mac OS X 10.8 / Xcode 4.4” in the category Dev.


I have install Mountain Lion (Mac OS X 10.8) and now gcc doesn’t seem to be available anymore. I’ve also installed Xcode 4.4 so there is no more /Developer directory.

I need gcc both for mac ports and for ruby gems (that have native extensions).

Does Xcode 4.4 include gcc or is there a way to install gcc?


I found that after upgrading from Lion my install was failing because it was looking for GCC in /usr/bin/gcc-4.2. Now the default installation path is /usr/bin/gcc.

My error looked like this:

make: /usr/bin/gcc-4.2: No such file or directory

A symlink will sort out the issue:

sudo ln -s /usr/bin/gcc /usr/bin/gcc-4.2



You can now just run the following command from your terminal:

xcode-select --install

Starting with Xcode 4.3 – you must now manually install command line tools from Xcode menu > Preferences > Downloads.

manual install image

Alternatively, there are stand-alone installation packages both for Mountain Lion (10.8) and for Mavericks (10.9).

This package enables UNIX-style development via Terminal by installing
command line developer tools, as well as Mac OS X SDK frameworks and
headers. Many useful tools are included, such as the Apple LLVM
compiler, linker, and Make.
If you use Xcode, these tools are also
embedded within the Xcode IDE, and can be installed on your system
using the Downloads preferences pane within Xcode 4.3 and later. This
package requires Mac OS X 10.7.3 or later.


pre-1.9.3 Ruby on Mountain Lion


Xcode 4.4, 
Xcode Command Line Tools
XQuartz 2.7.2 or later.
rbenv/ruby-build or RVM.

Install GCC

Note, the Xcode Command Line Tools do not include GCC, they include LLVM-GCC. Same-same, but different.

$ brew tap homebrew/dupes
$ brew install apple-gcc42

Add the following to your ~/.profile or equivalent:

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

And reload your shell before attempting the install commands below.

Install RVM

CFLAGS="-I/opt/X11/include" rvm reinstall ree

Install Ruby

Prefix the install command with CFLAGS="-I/opt/X11/include"

Then to set your new ruby as default:

user$ rvm use 1.9.2 --default

Then check your ruby version:

user$ ruby -v


Just paste this into terminal:

export PATH=/Applications/$PATH

I hope that helps!