rails MySQL on OSX Library not loaded libmysqlclient 18 dylib

Question

I m just starting out with Ruby  and rails   I did the setup according to http   ruby railstutorial org ruby-on-rails-tutorial-book sec ruby gems  using rvm  I have everything working well with sqlite    Now I d like to try converting things over to MySQL  since that s what I do most of my development with  In my Gemfile I ve replaced sqlite with mysql2   group  development   test do    gem  sqlite3    1 3 5    gem  mysql2    gem  rspec-rails    2 9 0  end   But when I try to create the DB for rails in MySQL I get     rake db create --trace rake aborted  dlopen  Users username  rvm gems ruby-1 9 3-p194 rails3tutorial2ndEd gems mysql2-0 3 11 lib mysql2 mysql2 bundle  9   Library not loaded  libmysqlclient 18 dylib   Referenced from   Users username  rvm gems ruby-1 9 3-p194 rails3tutorial2ndEd gems mysql2-0 3 11 lib mysql2 mysql2 bundle   Reason  image not found -  Users username  rvm gems ruby-1 9 3-p194 rails3tutorial2ndEd gems mysql2-0 3 11 lib mysql2 mysql2 bundle   I ve seen other postings recommending re-installing MySQL via homebrew  mine was installed via a downloadable DMG   but I d prefer not to do that as I have several other databases in there already for other non-ruby projects   I do in fact have the file that Rails is looking for  it s installed in  usr local mysql lib libmysqlclient 18 dylib  What s the best way to tell Rails how to locate it

User · Answer

gem uninstall -aIx   and  bundle install   worked for me

User · Answer

To be sure what symlink is needed  depend on mysql version and os version       locate libmysqlclient 18 dylib  usr local mysql-5 6 24-osx10 8-x86 64 lib libmysqlclient 18 dylib   and so    ln -s  usr local mysql-5 6 24-osx10 8-x86 64 lib libmysqlclient 18 dylib  usr lib libmysqlclient 18 dylib

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My issue with the loading of that bundle file was a bad symlink   So check the link  and replace it with a fresh one if needed   Everything fell into place at that point   Not sure how that happened  but it did   First time that a syntax error happened like that

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I am using Mac OS  and I was stuck with this bug even after uninstalling   removing all mysql and MAMP  Earlier  I installed brew install mysql and also used MAMP   addling softlink didn t work for me   It was only resolved by removing all existing mysql  and then install mysql through MySQL from here

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sudo ln -s  usr local mysql lib libmysqlclient 18 dylib  usr lib libmysqlclient 18 dylib   Worked for me  All the similar ones didn t

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I confirm patch from Abhishek does work   it work for Yosemite  too   note  instead of linking  to a particular version of mysql  use the fact mysql already built  symlink   sudo ln -s  usr local mysql lib libmysqlclient 18 dylib  usr lib libmysqlclient 18 dylib   this solution does work for Xcode and C API

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The solution is pretty easy  Add the library path in your    bash profile or    profile file   MYSQL  usr local mysql bin export PATH  PATH  MYSQL export DYLD LIBRARY PATH  usr local mysql lib  DYLD LIBRARY PATH   If it is still not working  this work for me    sudo ln -s  usr local mysql lib libmysqlclient 18 dylib  usr lib libmysqlclient 18 dylib   There are many blogs with install name tool  which won t work for me because I m on OSX Lion   sudo install name tool -change libmysqlclient 18 dylib  usr local mysql lib libmysqlclient 18 dylib  usr local bin indexer sudo install name tool -change libmysqlclient 18 dylib  usr local mysql lib libmysqlclient 18 dylib  usr local bin search

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sudo ln -s  usr local mysql-5 5 25-osx10 6-x86 64 lib libmysqlclient 18 dylib  usr lib libmysqlclient 18 dylib   That worked for me  I installed MySQL from a dmg file

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In El Capitan I got ln   usr lib libmysqlclient 18 dylib  Operation not permitted     In El Capitan  usr lib  now has a restricted flag and can t be written to without disabling security so I just put the link in  usr local lib instead   sudo ln -s  usr local mysql lib libmysqlclient 18 dylib  usr local lib libmysqlclient 18 dylib   Rails server is running fine again

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On Mac Sierra if using Homebrew then do   sudo ln -s  usr local Cellar mysql 5 6 5 6 34 lib libmysqlclient 18 dylib  usr local lib libmysqlclient 18 dylib

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I ran into this problem after a complete removal and then fresh install of MySQL  Specifically   Library not loaded   usr local opt mysql lib libmysqlclient 20 dylib   I had not even touched my Rails app   Reinstalling the mysql2 gem solved this problem     gem uninstall mysql2   gem install mysql2 -v 0 3 18    specifying the version found in my Gemfile lock     MySQL 5 7 10  Rails 4 0 0  Ruby 2 0 0  Mac OS X Yosemite 10 10

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For MySql 5 6 installed from DMG on Mavericks  sudo ln -s  usr local mysql-5 6 14-osx10 7-x86 64 lib libmysqlclient 18 dylib  usr lib libmysqlclient 18 dylib

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If you re using Bitnami RubyStack and ran across the similar problem  Try this one  sudo ln -s  Applications rubystack-2 0 0-17 mysql lib libmysqlclient 18 dylib  usr lib libmysqlclient 18 dylib

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There are already a lot of answer to this question  especially this one https   stackoverflow com a 10847618 5515861  I only want to add couple of notes  If you guys using Mac  I don t know how you install the MySQL  but the first thing to investigate is where is your MySQL installation is located  For me  MySQL is installed using brew for version 5 7  and the location is  usr local opt mysql 5 7   so add the following to my    zshrc   MYSQL  usr local opt mysql 5 7 bin  MYSQL LIB  usr local opt mysql 5 7 lib  export PATH  PATH  MYSQL export DYLD LIBRARY PATH  MYSQL LIB  DYLD LIBRARY PATH   Hope you fix your issues

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While the title of this question describes precisely the problem I encountered  the circumstances are different from those described in the previous answers  and so was the solution   In my case  El Capitan  mysql installed via homebrew   a brew update  amp  amp  brew upgrade caused the mysql package to be upgraded to 5 7 10  from 5 6 x    The upgrade caused libmysqlclient 18 dylib to be replaced with libmysqlclient 20 dylib  but the mysql2 gem was still relying on the former   To fix the problem I did  gem uninstall mysql2  amp  amp  gem install mysql2  Please note that similar problems can occur with different homebrew-managed libraries  see my own answer to this  for example

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I am using Rails REE  2 3 4  for a legacy system we have  After upgrading to El Capitan  running script console enerated an error and my app would no longer start  using pow      script console Loading development environment  Rails 2 3 4   blah-blah gems activerecord-2 3 4 lib active record connection adapters abstract connection specification rb 76 in establish connection RuntimeError  Please install the mysql2 adapter  gem install activerecord-mysql2-adapter  dlopen  blah-blah gems mysql2-0 2 19b4 lib mysql2 mysql2 bundle  9   Library not loaded  libmysqlclient 18 dylib   Referenced from   blah-blah gems mysql2-0 2 19b4 lib mysql2 mysql2 bundle   Reason  image not found -  blah-blah gems mysql2-0 2 19b4 lib mysql2 mysql2 bundle    From this very thread  above  I determined that I needed to issue this command in terminal sudo ln -s  usr local mysql lib libmysqlclient 18 dylib  usr lib libmysqlclient 18 dylib This command produced an error   ln   usr lib libmysqlclient 18 dylib  Operation not permitted   I have never seen that error before   After quite a bit of digging  I found this article  http   www macworld com article 2986118 security how-to-modify-system-integrity-protection-in-el-capitan html and followed the instructions to turn SIP  El Capitan s new System Integrity Protection  off  After turning SIP off  and after rebooting  the ln command worked fine  Then I turned SIP off  Now all is fine  My app runs again using pow and no error running script console  I hope this helps you

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If you are using MySQL installed from HomeBrew in El Capitan  then you should link it as follows   sudo ln -sf  usr local Cellar mysql 5 6 27 lib libmysqlclient 18 dylib  usr local lib libmysqlclient 18 dylib

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I got this issue  Library not loaded  libmysqlclient 18 dylib  when importing MySQLdb from MySQL For python3        Traceback  most recent call last     File  test py   line 3  in  lt module gt      import MySQLdb   File   opt local Library Frameworks Python framework Versions 3 5 lib python3 5 site-packages MySQL python-1 2 4-py3 5-macosx-10 11-x86 64 egg MySQLdb   init   py   line 19  in  lt module gt      import  mysql ImportError  dlopen  opt local Library Frameworks Python framework Versions 3 5 lib python3 5 site-packages MySQL python-1 2 4-py3 5-macosx-10 11-x86 64 egg  mysql cpython-35m-darwin so  2   Library not loaded  libmysqlclient 18 dylib   Referenced from   opt local Library Frameworks Python framework Versions 3 5 lib python3 5 site-packages MySQL python-1 2 4-py3 5-macosx-10 11-x86 64 egg  mysql cpython-35m-darwin so   Reason  image not found   Solution works for me  Mac OS X 10 11 1 Python3 5  Edit    bash profile  export PATH   opt local Library Frameworks Python framework Versions 3 5 bin  PATH  export PATH   opt local bin  opt local sbin  PATH  export PATH   usr local mysql bin  PATH  export PATH   usr local mysql lib  PATH  sudo ln -s  usr local mysql lib libmysqlclient 18 dylib  usr lib libmysqlclient 18 dylib

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I was working with the rails g model command and I got this error   Library not loaded  libmysqlclient 18 dylib   I have tried this and it functioned for me  I was using Mavericks 10 9 5  sudo ln -s  usr local mysql-5 6 19-osx10 7-x86 64 lib libmysqlclient 18 dylib  usr lib libmysqlclient 18 dylib   Thanks   Now I m using Yosemite 10 10 5 and  I got the same error  so I just ran this command on the terminal an it was successfully fixed up     sudo ln -s  usr local mysql-5 6 26-osx10 8-x86 64 lib libmysqlclient 18 dylib  usr lib libmysqlclient 18 dylib   also you can try   sudo ln -s  usr local mysql lib libmysqlclient 18 dylib  usr lib libmysqlclient 18 dylib   Both of them work fine for me  Hope it could be useful

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For those who are using brew  Just link you mysql version with  --force  option    brew link mysql56 --force

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Just for the records    gem pristine mysql2 solves this for me

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After a lot of googling and trying all above   the only thing that solved my problem was this command    install name tool -id  usr local lib libmysqlclient 18 dylib  usr local lib libmysqlclient 18 dylib   I am using a macbook pro  OSX 10 El Capitan  Darwin xxxx-MacBook-Pro local 15 6 0 Darwin Kernel Version 15 6 0  Thu Jun 23 18 25 34 PDT 2016  XXX xnu-3248 60 10 1 RELEASE X86 64 x86 64 Perl v5 18 2 Mysql 5 6 19

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This worked for me  All I had to do is uninstall mysql2 gem and install it again using the below commands  gem uninstall mysql2 gem install mysql2 -v  0 3 18  -- --with-mysql-config  usr local Cellar mysql 5 7 5 7 28 bin mysql config

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This works for me   ln -s  usr local Cellar mysql 5 6 22 lib libmysqlclient 18 dylib  usr local lib libmysqlclient 18 dylib

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use this from your command line   sudo install name tool -id  usr local mysql-connector-c-6 1 3-osx10 7-x86 64 lib libmysqlclient 18 dylib  usr local mysql-connector-c-6 1 3-osx10 7-x86 64 lib libmysqlclient 18 dylib   tried on fews computers with maverick always works

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Thanks  A Homebrew upgrade made my Rails apps have issues on my Mac  I reinstalled MySQL  5 7  from source  then I had to do this   sudo ln -s  usr local mysql-5 7 28-macos10 14-x86 64 lib libmysqlclient 20 dylib  usr lib libmysqlclient 20bdylib   based on what I read above  and in my Gemfile  gem  mysql2    0 5 3    and in database yml  adapter  mysql2

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The only thing that worked for me is   sudo install name tool -change libmysqlclient 18 dylib    usr local mysql-5 6 23-osx10 8-x86 64 lib libmysqlclient 18 dylib    Library Ruby Gems 2 0 0 gems mysql2-0 4 3 lib mysql2 mysql2 bundle   Replace the paths of mysql and gems to fit your system

[mysql] rails + MySQL on OSX: Library not loaded: libmysqlclient.18.dylib

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