I had a 3-year old installation of Homebrew in /usr/local/Library/Homebrew. It didn't update properly, so I reinstalled it (without, unfortunately, uninstalling first). This time, Homebrew installed in /usr/local/Homebrew.

Not only are the folder locations different, but the subfolders also are different. Is the old installation deprecated and can I delete it? Or does the new installation depend on the old installation? This is under Mac OS Sierra.

2 Answers 2


I'm sure new installations of Homebrew are installed under /usr/local/Homebrew/, so I see no harm in deleting the old installation. I also noticed I have no /usr/local/Library/ in my Sierra file structure.

To keep things tidy you might still be able to delete the old installation using the script which has more uninstall options.


FYI according to the Homebrew FAQ, the new installation folder on macOS on Apple Silicon is now /opt/homebrew.

The prefix /opt/homebrew was chosen to allow installations in /opt/homebrew for Apple Silicon and /usr/local for Rosetta 2 to coexist and use bottles.

  • While relevant for newer installations and hardware, note the age of the question, and that the OP mentions Sierra, distinctly pre-AS. Oct 11, 2023 at 11:40
  • 1
    @AndyGriffiths People searching for the topic via search engines may still end up here, having an answer which reflects the current situation provides value.
    – nohillside
    Oct 11, 2023 at 12:34
  • @nohillside Understood, hence why I attempted to qualify it. I wasn't clear enough in my statement vs my thought! Didn't want the takeaway that the old locations were invalid even on Intel. Oct 11, 2023 at 13:03

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .