How to install Nokogiri on Mac OS Sierra 10.12

Ruby Problem Overview

I'm having troubles installing Nokogiri (1.6.8.1) on Mac OS Sierra 10.12.

I tried using brew install libxml2 libxslt and then referencing the install directories using command line options but it didn't help.

Ruby Solutions

Solution 1 - Ruby

Open Xcode and, from the menu XCode -> Preferences update your Command Line Tools (Xcode 8.0).

Then do:

bundle config build.nokogiri --use-system-libraries=true --with-xml2-include="$(xcrun --show-sdk-path)"/usr/include/libxml2
bundle install

or just:

gem install nokogiri -v 1.6.8.1 -- --use-system-libraries=true --with-xml2-include="$(xcrun --show-sdk-path)"/usr/include/libxml2

Solution 2 - Ruby

The more simple solution is to execute:

xcode-select --install
gem install nokogiri

Update

For Mojave I'm using gem install nokogiri -v '1.6.6.2' -- --use-system-libraries

Solution 3 - Ruby

Try install libxml2 first with Homebrew.

brew install libxml2

Then if installing with bundle

bundle config build.nokogiri --use-system-libraries \
  --with-xml2-include=$(brew --prefix libxml2)/include/libxml2
bundle install

If installing directly with gem

gem install nokogiri -- --use-system-libraries \
  --with-xml2-include=$(brew --prefix libxml2)/include/libxml2

Solution 4 - Ruby

This might be a duplicate of https://stackoverflow.com/questions/39937394/gem-install-nokogiri-v-1-6-8-1-fails/ ... latest accepted answer there was to do:

brew unlink xz; bundle install; brew link xz

Re-linking xz might not be necessary ... if for example you only have that dependency because of the_silver_searcher (which links directly against the non-symlinked library).

Solution 5 - Ruby

gem update --system
xcode-select --install
brew unlink xz
gem install nokogiri -v '1.6.8.1'
brew link xz

If the above steps fail to fix the issue, what has also worked for me is running brew doctor and cleaning up any unbrewed header files.

Solution 6 - Ruby

Similar to yuяi's answer and from Nokogiri's help:

brew unlink xz
gem install nokogiri
brew link xz

http://www.nokogiri.org/tutorials/installing_nokogiri.html#mac_os_x

This worked for 1.7.0.1

Solution 7 - Ruby

For Middleman

gem install nokogiri -v '1.8.2' -- --use-system-libraries=true --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/usr/include/libxml2/

Solution 8 - Ruby

If you have earlier installed nokogiri using bundler with bundle config build.nokogiri --use-system-libraries this setting will still be there. If you then meanwhile have solved your Xcode setup (as suggested as the primary method of installation in the nokogiri installation) then you might wanna try removing that fra from bundler bundle config --delete build.nokogiri and try again doing bundle install.

Solution 9 - Ruby

First install XCode from the app store

then run

bundle config build.nokogiri --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include/libxml2 --use-system-libraries