OSX Homebrew error: uninitialized constant MACOS

Question

I\'ve searched around a bit and can\'t seem to find any record of anyone else with this problem.

Whenever I try to run

$ brew update

Answer 1

The MACOS constant is set in globals.rb. It seems like you may have a borked installation of Homebrew.

Check the output of brew doctor for any suggestions.

If that doesn't help please update with the results of brew --config.

If all else fails you may want to try re-installing Homebrew.

---

UPDATE:

Since this was a previous user's machine make sure your user is the owner of /usr/local and everything within. Fix it with sudo chown -R $USER /usr/local.