July 3, 2013
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If you are using a Mac, you must be familiar with Homebrew. After installing brew, you must run the following command to ensure it is ready to install packages.
When you install a package, e.g., git, that also comes pre-installed with Mac, you will notice that even though brew installed a newer version of that package, it is still the older version (the one provided by the system) that seems to be taking precedence.
Here is the reason why this happens:
Brew installs the packages into their own directories and symlinks the executables into /usr/local/bin. If you run brew doctor at this point, it clearly mentions what is happening behind the scenes:
Warning: /usr/bin occurs before /usr/local/bin This means that system-provided programs will be used instead of those provided by Homebrew.
Consider amending your PATH so that /usr/local/bin is ahead of /usr/bin in your PATH.
Modify the sequence of paths in /etc/paths file so that /usr/local/bin comes ahead of /usr/bin.
sudo vi /etc/paths
Here is a sample /etc/paths file (after the change):
If you check the version of the installed package at this point, it would be the one installed by brew.