This is a list of commonly encountered problems, known issues, and their solutions.
brew complains about absence of “Command Line Tools”
You need to have the Xcode Command Line Utilities installed (and updated): run
xcode-select --install in the terminal.
(In OS X prior to 10.9, the “Command Line Tools” package can alternatively be installed from within Xcode.
⌘, will get you to preferences. Visit the “Downloads” tab and hit the install button next to “Command Line Tools”.)
bad interpreter: /usr/bin/ruby^M: no such file or directory
You cloned with git, and your git configuration is set to use Windows line endings. See this page: https://help.github.com/articles/dealing-with-line-endings
bad interpreter: /usr/bin/ruby
You don’t have a
/usr/bin/ruby or it is not executable. It’s not recommended to let this persist, you’d be surprised how many .apps, tools and scripts expect your macOS provided files and directories to be unmodified since macOS was installed.
brew update complains about untracked working tree files
brew update, you receive a git error warning about untracked files or local changes that would be overwritten by a checkout or merge, followed by a list of files inside your Homebrew installation.
This is caused by an old bug in in the
update code that has long since been fixed. However, the nature of the bug requires that you do the following:
cd $(brew --repository) git reset --hard FETCH_HEAD
brew doctor still complains about uncommitted modifications, also run this command:
cd $(brew --repository)/Library
git clean -fd
invalid multibyte escape: /^\037\213/
You see an error similar to:
Error: /usr/local/Library/Homebrew/download_strategy.rb:84: invalid multibyte escape: /^\037\213/ invalid multibyte escape: /^\037\235/
In the past, Homebrew assumed that
/usr/bin/ruby was Ruby 1.8. On OS X 10.9, it is now Ruby 2.0. There are various incompatibilities between the two versions, so if you upgrade to OS X 10.9 while using a sufficiently old version of Homebrew, you will encounter errors.
The incompatibilities have been addressed in more recent versions of Homebrew, and it does not make assumptions about
/usr/bin/ruby, instead it uses the executable inside MacOS’s Ruby framework or a vendored Ruby.
To recover from this situation, do the following:
cd /usr/local # your Homebrew prefix git fetch origin git reset --hard FETCH_HEAD brew update
launchctl refuses to load launchd plist files
When trying to load a plist file into launchctl, you receive an error that resembles
Bug: launchctl.c:2325 (23930):13: (dbfd = open(g_job_overrides_db_path, [...] launch_msg(): Socket is not connected
Could not open job overrides database at: /private/var/db/launchd.db/com.apple.launchd/overrides.plist: 13: Permission denied launch_msg(): Socket is not connected
These are likely due to one of four issues:
- You are using iTerm. The solution is to use Terminal.app when interacting with
- You are using a terminal multiplexer such as
screen. You should interact with
launchctlfrom a separate Terminal.app shell.
- You are attempting to run
launchctlwhile logged in remotely. You should enable screen sharing on the remote machine and issue the command using Terminal.app running on that machine.
- You are su’ed as a different user.
brew upgrade errors out
brew upgrade, you see something like this:
$ brew upgrade
Error: undefined method `include?' for nil:NilClass
Please report this bug:
This happens because an old version of the upgrade command is hanging around for some reason. The fix:
$ cd $(brew --repository)/Library/Contributions/examples $ git clean -n # if this doesn't list anything that you want to keep, then $ git clean -f # this will remove untracked files
Python: easy-install.pth cannot be linked
Warning: Could not link <formulaname>. Unlinking... Error: The `brew link` step did not complete successfully The formula built, but is not symlinked into /usr/local You can try again using `brew link <formulaname>' Possible conflicting files are: /usr/local/lib/python2.7/site-packages/site.py /usr/local/lib/python2.7/site-packages/easy-install.pth ==> Could not symlink file: /homebrew/Cellar/<formulaname>/<version>/lib/python2.7/site-packages/site.py Target /usr/local/lib/python2.7/site-packages/site.py already exists. You may need to delete it. To force the link and overwrite all other conflicting files, do: brew link --overwrite formula_name To list all files that would be deleted: brew link --overwrite --dry-run formula_name
Don’t follow the advice here but fix by using
Language::Python.setup_install_args in the formula as described in
Python for Formula Authors.
Upgrading macOS can cause errors like the following:
dyld: Library not loaded: /usr/local/opt/icu4c/lib/libicui18n.54.dylib
configure: error: Cannot find libz
Following an macOS upgrade it may be necessary to reinstall the Xcode Command Line Tools and
brew upgrade all installed formula:
xcode-select --install brew upgrade