Homebrew: brew doctor throwing up a lot of errors, how can I fix them? [closed]

Answer 1

Basically you have things in /usr/local that are not done via homebrew and confuses it. So you have to choose to keep the homebrew stuff or the others.

If you do not know which is which I would backup /usr/local amd delete it and start with all homebrew or all others.

Answer 2

It states in the error message what the problem is;

Warning: /usr/local/include isn't writable
You should probably change the ownership and permissions of /usr/local

back to your user account.

If you run ls -l /usr/local/ you should have an output like this:

total 4
-rw-r--r--    1 user  admin    493 23 Apr 15:14 CONTRIBUTING.md
drwxr-xr-x   17 user  admin    578  5 May 14:54 Cellar
drwxr-xr-x    3 user  admin    102 23 Apr 16:33 Frameworks
drwxr-xr-x   10 user  admin    340 24 Apr 08:50 Library

Where user is your username and admin is your group. If you see something more like:

drwxr-xr-x   17 root  wheel    578  5 May 14:54 Cellar

you will have to run chown -R user:admin /usr/local which will change the ownership back to your user.

This should solve the first part. However, be warned, this could stop other software working if you have previously run "sudo make install" software that isn't managed by Homebrew.

There is also a great answer on How do i fix brew doctor errors that addresses your DYLD_LIBRARY_PATH issues.