Hey, I am getting the following errors: Kimons-MacBook-Pro:graph-tool-2.25 kimonfountoulakis$ brew instal -s --with-python3 graph-tool ==> Installing graph-tool from homebrew/science ==> Installing dependencies for homebrew/science/graph-tool: matplotlib, py2cairo, libcroco, librsvg, gnome-icon-theme, pygobject3 ==> Installing homebrew/science/graph-tool dependency: matplotlib ==> Downloading https://files.pythonhosted.org/packages/f5/f0/9da3ef24ea7eb0ccd12430a261b66e... Already downloaded: /Users/kimonfountoulakis/Library/Caches/Homebrew/matplotlib-2.0.2.tar.gz ==> Downloading https://files.pythonhosted.org/packages/dc/8c/7c9869454bdc53e72fb87ace63eac3... Already downloaded: /Users/kimonfountoulakis/Library/Caches/Homebrew/matplotlib--setuptools-33.1.1.zip ==> python -c import setuptools... --no-user-cfg install --prefix=/usr/local/Cellar/matplotlib/2.0.2/libexec --single-version-externally-managed --record=installed.txt ==> Downloading https://files.pythonhosted.org/packages/c2/4b/137dea450d6e1e3d474e1d873cd1d4... Already downloaded: /Users/kimonfountoulakis/Library/Caches/Homebrew/matplotlib--Cycler-0.10.0.tar.gz ==> python -c import setuptools... --no-user-cfg install --prefix=/usr/local/Cellar/matplotlib/2.0.2/libexec --single-version-externally-managed --record=installed.txt ==> Downloading https://files.pythonhosted.org/packages/c5/60/6ac26ad05857c601308d8fb9e87fa3... Already downloaded: /Users/kimonfountoulakis/Library/Caches/Homebrew/matplotlib--functools32-3.2.3-2.tar.gz ==> python -c import setuptools... --no-user-cfg install --prefix=/usr/local/Cellar/matplotlib/2.0.2/libexec --single-version-externally-managed --record=installed.txt ==> Downloading https://files.pythonhosted.org/packages/38/bb/bf325351dd8ab6eb3c3b7c07c3978f... Already downloaded: /Users/kimonfountoulakis/Library/Caches/Homebrew/matplotlib--pyparsing-2.1.10.tar.gz ==> python -c import setuptools... --no-user-cfg install --prefix=/usr/local/Cellar/matplotlib/2.0.2/libexec --single-version-externally-managed --record=installed.txt ==> Downloading https://files.pythonhosted.org/packages/51/fc/39a3fbde6864942e8bb24c93663734... Already downloaded: /Users/kimonfountoulakis/Library/Caches/Homebrew/matplotlib--python-dateutil-2.6.0.tar.gz ==> python -c import setuptools... --no-user-cfg install --prefix=/usr/local/Cellar/matplotlib/2.0.2/libexec --single-version-externally-managed --record=installed.txt ==> Downloading https://files.pythonhosted.org/packages/d0/e1/aca6ef73a7bd322a7fc73fd99631ee... Already downloaded: /Users/kimonfountoulakis/Library/Caches/Homebrew/matplotlib--pytz-2016.10.tar.bz2 ==> python -c import setuptools... --no-user-cfg install --prefix=/usr/local/Cellar/matplotlib/2.0.2/libexec --single-version-externally-managed --record=installed.txt ==> Downloading https://files.pythonhosted.org/packages/b3/b2/238e2590826bfdd113244a40d9d3eb... Already downloaded: /Users/kimonfountoulakis/Library/Caches/Homebrew/matplotlib--six-1.10.0.tar.gz ==> python -c import setuptools... --no-user-cfg install --prefix=/usr/local/Cellar/matplotlib/2.0.2/libexec --single-version-externally-managed --record=installed.txt ==> Downloading https://files.pythonhosted.org/packages/b8/2f/49e53b0d0e94611a2dc624a1ad24d4... Already downloaded: /Users/kimonfountoulakis/Library/Caches/Homebrew/matplotlib--subprocess32-3.2.7.tar.gz ==> python -c import setuptools... --no-user-cfg install --prefix=/usr/local/Cellar/matplotlib/2.0.2/libexec --single-version-externally-managed --record=installed.txt ==> python -c import setuptools... --no-user-cfg install --prefix=/usr/local/Cellar/matplotlib/2.0.2 --single-version-externally-managed --record=installed.txt Last 15 lines from /Users/kimonfountoulakis/Library/Logs/Homebrew/matplotlib/09.python: ~~^ /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/cmath:322:9: error: no member named 'islessequal' in the global namespace using ::islessequal; ~~^ /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/cmath:323:9: error: no member named 'islessgreater' in the global namespace using ::islessgreater; ~~^ /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/cmath:324:9: error: no member named 'isunordered' in the global namespace using ::isunordered; ~~^ /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/cmath:325:9: error: no member named 'isunordered' in the global namespace using ::isunordered; ~~^ 13 errors generated. error: command 'clang' failed with exit status 1 READ THIS: https://docs.brew.sh/Troubleshooting.html /usr/local/Homebrew/Library/Homebrew/utils/github.rb:210:in `raise_api_error': GitHub (GitHub::AuthenticationFailedError) The GitHub credentials in the macOS keychain may be invalid. Clear them with: printf "protocol=https\nhost=github.com\n" | git credential-osxkeychain erase Or create a personal access token: https://github.com/settings/tokens/new?scopes=gist,public_repo&description=H... and then set the token as: export HOMEBREW_GITHUB_API_TOKEN="your_new_token" from /usr/local/Homebrew/Library/Homebrew/utils/github.rb:178:in `open' from /usr/local/Homebrew/Library/Homebrew/utils/github.rb:278:in `search' from /usr/local/Homebrew/Library/Homebrew/utils/github.rb:225:in `search_issues' from /usr/local/Homebrew/Library/Homebrew/utils/github.rb:238:in `issues_for_formula' from /usr/local/Homebrew/Library/Homebrew/exceptions.rb:369:in `fetch_issues' from /usr/local/Homebrew/Library/Homebrew/exceptions.rb:365:in `issues' from /usr/local/Homebrew/Library/Homebrew/exceptions.rb:419:in `dump' from /usr/local/Homebrew/Library/Homebrew/brew.rb:135:in `rescue in <main>' from /usr/local/Homebrew/Library/Homebrew/brew.rb:30:in `<main>' Any ideas? -- Sent from: http://main-discussion-list-for-the-graph-tool-project.982480.n3.nabble.com/