Can't chown /usr/local in High Sierra

[dtamayo]

I am running OS X High Sierra and need to change permissions for /usr/local, but it won't let me. I first ran brew update, and after fixing issues, brew doctor just gives:

Warning: You have unlinked kegs in your Cellar
Leaving kegs unlinked can lead to build-trouble and cause brews that depend on
those kegs to fail to run properly once built. Run brew link on these:
gdbm
python
libyaml
ruby

brew link ruby gives:

Linking /usr/local/Cellar/ruby/2.4.2...
Error: Could not symlink include/ruby-2.4.0
/usr/local/include is not writable.

sudo chown -R $(whoami) $(brew --prefix) gives
chown: /usr/local: Operation not permitted

ls -lO /usr gives
total 0
drwxr-xr-x 975 root wheel restricted 31200 26 Sep 21:55 bin
drwxr-xr-x 292 root wheel restricted 9344 26 Sep 22:06 lib
drwxr-xr-x 233 root wheel restricted 7456 26 Sep 21:55 libexec
drwxr-xr-x 13 root wheel sunlnk 416 26 Sep 22:05 local
drwxr-xr-x 246 root wheel restricted 7872 26 Sep 21:55 sbin
drwxr-xr-x 46 root wheel restricted 1472 26 Sep 21:55 share
drwxr-xr-x 5 root wheel restricted 160 21 Sep 00:32 standalone

brew config gives

HOMEBREW_VERSION: 1.3.4
ORIGIN: https://github.com/Homebrew/brew
HEAD: ac8b585
Last commit: 2 days ago
Core tap ORIGIN: https://github.com/Homebrew/homebrew-core
Core tap HEAD: 168b65e
Core tap last commit: 2 hours ago
HOMEBREW_PREFIX: /usr/local
HOMEBREW_REPOSITORY: /usr/local/Homebrew
HOMEBREW_CELLAR: /usr/local/Cellar
HOMEBREW_BOTTLE_DOMAIN: https://homebrew.bintray.com
CPU: quad-core 64-bit kabylake
Homebrew Ruby: 2.3.3 => /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/bin/ruby
Clang: 9.0 build 900
Git: 2.14.1 => /usr/local/bin/git
Perl: /usr/local/bin/perl => /usr/local/Cellar/perl/5.26.0/bin/perl
Python: /usr/local/opt/python/libexec/bin/python => /usr/local/Cellar/python/2.7.14/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python
Ruby: /usr/bin/ruby => /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/bin/ruby
Java: N/A
macOS: 10.13-x86_64
Xcode: 9.0
CLT: N/A
X11: N/A

Any ideas on how to proceed? Thanks!

[ilovezfs]

Correct. /usr/local can no longer be chown'd in High Sierra. Instead use

sudo chown -R $(whoami) $(brew --prefix)/*

[dtamayo]

Amazing, thanks! I first had to mkdir include and Frameworks in /usr/local before running that command, but now everything works.

[MikeMcQuaid]

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[ethicalhack3r]

FYI I had to create the /usr/local/include directory before running sudo chown -R $(whoami) $(brew --prefix)/* to fix.

Thank you for the help!