Hello fellow Treehouse community. I am trying to install rail on my new mac and now I am getting a super long error. I have tried all around Google but for some reason I can get the right fix for it.

Here is the long terminal code:

CODE START HERE-----------------------------------------------

 ~   master±  gem install rails Building native extensions. This could take a while... ERROR: Error installing rails: ERROR: Failed to build gem native extension.

current directory: /Users/m2k11/.rvm/gems/ruby-2.3.0/gems/nokogiri-1.6.8/ext/nokogiri

/Users/m2k11/.rvm/rubies/ruby-2.3.0/bin/ruby -r ./siteconf20160613-74461-1sd343m.rb extconf.rb Using pkg-config version 1.1.7 checking if the C compiler accepts ... yes checking if the C compiler accepts -Wno-error=unused-command-line-argument-hard-error-in-future... no Building nokogiri using packaged libraries. Using mini_portile version 2.1.0 checking for iconv.h... yes checking for gzdopen() in -lz... yes checking for iconv using --with-opt-* flags... yes

IMPORTANT NOTICE:

Building Nokogiri with a packaged version of libxml2-2.9.4.

Team Nokogiri will keep on doing their best to provide security updates in a timely manner, but if this is a concern for you and want to use the system library instead; abort this installation process and reinstall nokogiri as follows:

gem install nokogiri -- --use-system-libraries
    [--with-xml2-config=/path/to/xml2-config]
    [--with-xslt-config=/path/to/xslt-config]

If you are using Bundler, tell it to use the option:

bundle config build.nokogiri --use-system-libraries
bundle install

Note, however, that nokogiri is not fully compatible with arbitrary versions of libxml2 provided by OS/package vendors.

Extracting libxml2-2.9.4.tar.gz into tmp/x86_64-apple-darwin15.5.0/ports/libxml2/2.9.4... OK Running 'configure' for libxml2 2.9.4... OK

Running 'compile' for libxml2 2.9.4... ERROR, review '/Users/m2k11/.rvm/gems/ruby-2.3.0/gems/nokogiri-1.6.8/ext/nokogiri/tmp/x86_64-apple-darwin15.5.0/ports/libxml2/2.9.4/compile.log' to see what happened. Last lines are:

unsigned short* in = (unsigned short*) inb;
                     ^~~~~~~~~~~~~~~~~~~~~

encoding.c:815:27: warning: cast from 'unsigned char ' to 'unsigned short *' increases required alignment from 1 to 2 [-Wcast-align] unsigned short out = (unsigned short*) outb; ^~~~~~~~~~~~~~~~~~~~~~ 4 warnings generated. CC error.lo CC parserInternals.lo CC parser.lo CC tree.lo CC hash.lo CC list.lo CC xmlIO.lo xmlIO.c:1450:52: error: use of undeclared identifier 'LZMA_OK' ret = (__libxml2_xzclose((xzFile) context) == LZMA_OK ) ? 0 : -1; ^ 1 error generated. make[2]: *** [xmlIO.lo] Error 1 make[1]: *** [all-recursive] Error 1

make: *** [all] Error 2

*** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options.

Provided configuration options: --with-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/Users/m2k11/.rvm/rubies/ruby-2.3.0/bin/$(RUBY_BASE_NAME) --help --clean --use-system-libraries --enable-static --disable-static --with-zlib-dir --without-zlib-dir --with-zlib-include --without-zlib-include=${zlib-dir}/include --with-zlib-lib --without-zlib-lib=${zlib-dir}/lib --enable-cross-build --disable-cross-build /Users/m2k11/.rvm/rubies/ruby-2.3.0/lib/ruby/gems/2.3.0/gems/mini_portile2-2.1.0/lib/mini_portile2/mini_portile.rb:366:in block in execute': Failed to complete compile task (RuntimeError) from /Users/m2k11/.rvm/rubies/ruby-2.3.0/lib/ruby/gems/2.3.0/gems/mini_portile2-2.1.0/lib/mini_portile2/mini_portile.rb:337:inchdir' from /Users/m2k11/.rvm/rubies/ruby-2.3.0/lib/ruby/gems/2.3.0/gems/mini_portile2-2.1.0/lib/mini_portile2/mini_portile.rb:337:in execute' from /Users/m2k11/.rvm/rubies/ruby-2.3.0/lib/ruby/gems/2.3.0/gems/mini_portile2-2.1.0/lib/mini_portile2/mini_portile.rb:111:incompile' from /Users/m2k11/.rvm/rubies/ruby-2.3.0/lib/ruby/gems/2.3.0/gems/mini_portile2-2.1.0/lib/mini_portile2/mini_portile.rb:150:in cook' from extconf.rb:364:inblock (2 levels) in process_recipe' from extconf.rb:257:in block in chdir_for_build' from extconf.rb:256:inchdir' from extconf.rb:256:in chdir_for_build' from extconf.rb:363:inblock in process_recipe' from extconf.rb:262:in tap' from extconf.rb:262:inprocess_recipe' from extconf.rb:555:in `<main>'

To see why this extension failed to compile, please check the mkmf.log which can be found here:

/Users/m2k11/.rvm/gems/ruby-2.3.0/extensions/x86_64-darwin-15/2.3.0/nokogiri-1.6.8/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /Users/m2k11/.rvm/gems/ruby-2.3.0/gems/nokogiri-1.6.8 for inspection. Results logged to /Users/m2k11/.rvm/gems/ruby-2.3.0/extensions/x86_64-darwin-15/2.3.0/nokogiri-1.6.8/gem_make.out

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Any help will be appreciated. Thanks!