MacOs new users

[davidmgvaz]

If using Homebrew or MacPorts this should already be done, otherwise:

in a terminal: $xcode-select --install

For mojave this might also be necessary (installing the missing header files): $ install -pkg /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg

In my case, I also ended up with some missing symbolic links:

$cd /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/

$ sudo ln -s MacOSX10.14.sdk MacOSX.sdk