Problems with BREW installing SIP:

$ brew install sip
Error: The `brew link` step did not complete successfully
The formula built, but is not symlinked into /usr/local
Could not symlink include/sip.h
/usr/local/include is not writable.

You can try again using:
  brew link sip

$ brew link sip
Linking /usr/local/Cellar/sip/4.19.5... 
Error: Could not symlink include/sip.h
/usr/local/include is not writable.

Find /usr/local/ there is no path /usr/local/include
need to create this path and modify the permissions
Solution:

$ sudo mkdir /usr/local/include
$ sudo chown $(whoami):admin /usr/local/include

Success:

$ brew link sip
Linking /usr/local/Cellar/sip/4.19.5... 10 symlinks created

Read More:

• Under win864 bit, install python, PyQt4 and sip. (final failure, only record)
• brew Error: Could not create /usr/local/Cellar
• Mac brew fails to work and an error is reported
• Mac installation opencv brew tap homebrew / Science
• brew install node Error: No such file or directory @ dir_chdir Bottle installation failed
• [MacOS] brew install 404：Bottle missing, falling back to the default domain…
• brew install tmux: Error: parent directory is world writable but not sticky
• Brew cask installation software prompt: error: unknown command: cask
• Error: Could not link: /usr/local/share/doc/homebrew
• 2019.11.14 Mac uses brew to report an error: parent directory is world writable but not sticky
• Error in brew install: curl: (22) the requested URL returned error: 404 Not Found
• Error: No such keg: /usr/local/Cellar/node&install nvm&brew installation&Oh my zsh.git installation&git set alias&No bundle URL prese
• CANNOT LINK EXECUTABLE: cannot locate symbol
• [Solved] error: link.exe‘ failed with exit status 1158
• The firmware of the connected j-link does not support the following memory access)
• Error: no such keg: / usr / local / cellular / node & install NVM & Brew install & oh my Zsh. Git install & git set alias & no bundle URL press
• Communication link failure when connecting Doris
• Sqoop import error communications link failure
• Link: fatal error LNK1104: cannot open file “debug”/ xx.exe The question of