Library not loaded libmysqlclient 16 dylib error when trying to run rails server on OS X 10 6 with mysql2 gem

Question

I ve been struggling with this for some time   I ve installed Rails 3  gem  mysql on my Snow Leopard machine  All was going well until I created my first project and tried to run   rails server   Upon running this I get   jontybrook  rails server  Library Ruby Gems 1 8 gems mysql2-0 2 6 lib mysql2 mysql2 bundle  dlopen  Library Ruby Gems 1 8 gems mysql2-0 2 6 lib mysql2 mysql2 bundle  9   Library not loaded  libmysqlclient 16 dylib  LoadError    Referenced from   Library Ruby Gems 1 8 gems mysql2-0 2 6 lib mysql2 mysql2 bundle   Reason  image not found -  Library Ruby Gems 1 8 gems mysql2-0 2 6 lib mysql2 mysql2 bundle     from  Library Ruby Gems 1 8 gems mysql2-0 2 6 lib mysql2 rb 7     from  Library Ruby Gems 1 8 gems bundler-1 0 7 lib bundler runtime rb 64 in  require      from  Library Ruby Gems 1 8 gems bundler-1 0 7 lib bundler runtime rb 64 in  require      from  Library Ruby Gems 1 8 gems bundler-1 0 7 lib bundler runtime rb 62 in  each      from  Library Ruby Gems 1 8 gems bundler-1 0 7 lib bundler runtime rb 62 in  require      from  Library Ruby Gems 1 8 gems bundler-1 0 7 lib bundler runtime rb 51 in  each      from  Library Ruby Gems 1 8 gems bundler-1 0 7 lib bundler runtime rb 51 in  require      from  Library Ruby Gems 1 8 gems bundler-1 0 7 lib bundler rb 112 in  require      from  Users jontybrook Dropbox CODING simple cms config application rb 7     from  Library Ruby Gems 1 8 gems railties-3 0 3 lib rails commands rb 28 in  require      from  Library Ruby Gems 1 8 gems railties-3 0 3 lib rails commands rb 28     from  Library Ruby Gems 1 8 gems railties-3 0 3 lib rails commands rb 27 in  tap      from  Library Ruby Gems 1 8 gems railties-3 0 3 lib rails commands rb 27     from script rails 6 in  require      from script rails 6 jontybrook     As far as I can tell the problem is with the mysql2 gem  MySQL seems to be running fine and my Gemfile references mysql2  my database yml file seems ok also   The error mentions  Reason  image not found -  Library Ruby Gems 1 8 gems mysql2-0 2 6 lib mysql2 mysql2 bundle   And yet   jontybrook  cd  Library Ruby Gems 1 8 gems mysql2-0 2 6 lib mysql2 jontybrook  ls client rb   em rb       error rb      mysql2 bundle result rb   MySQL2 bundle is there    If I use the old mysql gem  WEBrick boots fine  But that s not ideal  is it   I ve tried everything google can give me  Any help much appreciated

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I solved this problem by deleting my gemset for my current project and recreating it and rerunning bundle install   I think I caused it by installing a newer version of mysql

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following lines works for me  I am using mac 10 7 2    sudo ln -s  usr local mysql lib libmysqlclient 18 dylib  usr lib libmysqlclient 18 dylib

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I had this issue when working with Django  I use brew to install a lot of my Open Source programs and I needed to do the following since I used brew to install mysql   sudo ln -s  usr local Cellar mysql 5 5 20 lib libmysqlclient 18 dylib  usr lib libmysqlclient 18 dylib   Be sure to replace with your version of the libraries

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I still found that with the solutions above  it didn t work  for example  with the Rails plugin for TextMate  I got a similar error  when retrieving the database schema    So what did is  open terminal   cd  usr local lib sudo ln -s    mysql-5 5 8-osx10 6-x86 64 lib libmysqlclient 16 dylib     Replace mysql-5 5 8-osx10 6-x86 64 with your own path  or mysql    This makes a symbol link to the lib  now rails runs from the command line  as-well as TextMate plugin s  like ruby-on-rails-tmbundle   To be clear  this also fixes the error you get when starting rails server

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hi it worked for me from the recommended link from Fredy Andersen  sudo install name tool -change libmysqlclient 16 dylib  usr local mysql  lib libmysqlclient 16 dylib  Library Ruby Gems 1 8 gems mysql2-0 2 6 lib mysql2 mysql2 bundle   just had to change to my version of mysql  in the command  thanks

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If you re using OSX and installed mysql using brew  you can   brew link mysql   If you re having trouble with the version  I had mysql 5 7 running while my gem required 5 6 25   you can  brew unlink mysql brew switch mysql 5 6 25

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This is how it worked for me   I ran the below command sudo install name tool -change libmysqlclient 18 dylib  usr local mysql lib libmysqlclient 18 dylib    rvm gems ruby-1 9 2-p180 gems mysql2-0 2 7 lib mysql2 mysql2 bundle  My environments    rails -v Rails 3 0 6    mysql --version mysql  Ver 14 14 Distrib 5 5 11  for osx10 6  i386  using readline 5 1    ruby -v  ruby 1 9 2p180  2011-02-18 revision 30909   x86 64-darwin10 7 0   Hope this helps someone

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I ve had this exact same problem a few days ago  I eventually managed to solve it  I m not quite sure how  but I ll tell you what I did anyway  Maybe it ll help you   I started by downloading RVM  If you aren t using it yet  I highly recommend doing so  It basically creates a sandbox for a new separate installation of Ruby  RoR and RubyGems  In fact  you can have multiple installations simultaneously and instantly switch to one other  It works like a charm   Why is this useful  Because you shouldn t mess with the default Ruby installation in OS X  The system depends on it  It s best to just leave the default Ruby and RoR installation alone and create a new one using RVM that you can use for your own development   Once I created my separate Ruby installation  I just installed RoR  RubyGems and mysql  and it worked  For the exact steps I took  see my question  Installing Rails  MySQL  etc  everything goes wrong  Again  I don t know for certain this will solve your problem  But it certainly did the trick for me  and in any case using RVM is highly recommendable

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My version of luvlss s command   Mac OSX 10 10 5  MySQL 5 6 27  Passenger 5 0 21  sudo ln -s  usr local mysql-5 6 27-osx10 8-x86 64 lib libmysqlclient 18 dylib  usr lib libmysqlclient 18 dylib  If you re trying lots of different links  like I did  do some clean-up with   sudo unlink  usr lib libmysqlclient 18 dylib

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For me I had to manually uninstall mysql  brew uninstall mysql rm -rf  usr local var mysql brew install mysql

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bundle install mysql --force helped me  It reinstalled dependencies which ware gone as a result of brew uninstall mysql

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Open a Terminal and run the following     export PATH  PATH  usr local mysql bin   It should work

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I have solved this  eventually    I re-installed Ruby and Rails under RVM  I m using Ruby version 1 9 2-p136   After re-installing under rvm  this error was still present    In the end the magic command that solved it was   sudo install name tool -change libmysqlclient 16 dylib  usr local mysql lib libmysqlclient 16 dylib    rvm gems ruby-1 9 2-p136 gems mysql2-0 2 6 lib mysql2 mysql2 bundle   Hope this helps someone else

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This usually happen when you upgrade mysql  The installed mysql2 gem which was built on the old mysql libs cannot work with new libs  Just need to reinstall it   Uninstall mysql2 with gem uninstall mysql2  Then install it with gem install mysql2

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In OSX El Capitan update when you do this   sudo ln -s  usr local mysql lib libmysqlclient 18 dylib  usr lib libmysqlclient 18 dylib   it throws an error like   ln   usr lib libmysqlclient 18 dylib  Operation not permitted   So to avoid this  what you can do is first locate libmysqlclient 18 dylib using the command   User  locate libmysqlclient 18 dylib   In my case it returned  usr local mysql-5 5 24-osx10 5-x86 64 lib libmysqlclient 18 dylib  So instead of usr lib  we will create symlink to usr local lib  like this    sudo ln -s  usr local mysql lib libmysqlclient 18 dylib  usr local lib libmysqlclient 18 dylib   More details   https   forums developer apple com thread 7935

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I ve resolved it by creating  rvmrc file in my project folder containg   rvm use  lt yourrubie gt    then entering my project path  cd   myprojectpath   then I run   bundle install

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Thanks  Ogapo  Exporting that alias worked for me  and then I followed the link  and in my case the mysql2 bundle was up in  Library Ruby Gems 1 8 gems mysql2-0 2 6 lib mysql2 mysql2 bundle so I adjusted the install name tool to modify that bundle rather than one in    rvm and got that working the way it should be done   So now        otool -L  Library Ruby Gems 1 8 gems mysql2-0 2 6 lib mysql2 mysql2 bundle       Library Ruby Gems 1 8 gems mysql2-0 2 6 lib mysql2 mysql2 bundle           System Library Frameworks Ruby framework Versions 1 8 usr lib libruby 1 dylib  compatibility version 1 8 0  current version 1 8 7           usr local mysql lib libmysqlclient 16 dylib  compatibility version 16 0 0  current version 16 0 0           usr lib libSystem B dylib  compatibility version 1 0 0  current version 125 2 1

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Jonty  I m struggling with this too   I think there s a clue in here   otool -L  Library Ruby Gems 1 8 gems mysql2-0 2 6 lib mysql2 mysql2 bundle   Library Ruby Gems 1 8 gems mysql2-0 2 6 lib mysql2 mysql2 bundle       System Library Frameworks Ruby framework Versions 1 8 usr lib libruby 1 dylib  compatibility version 1 8 0  current version 1 8 7      libmysqlclient 16 dylib  compatibility version 16 0 0  current version 16 0 0       usr lib libSystem B dylib  compatibility version 1 0 0  current version 125 2 1    Notice the path to the dylib is  uh  rather short   I m trying to figure out where the gem install instructions are leaving off the dylib path  but it s slow going as I have never built a gem myself   I ll post more if I find more

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I was never able to get any of these answers to work for me  but this is the command that I used to make it work for me  This way you don t need to use install name tool every time you update your mysql   sudo ln -s  usr local mysql lib libmysqlclient 18 dylib  usr lib libmysqlclient 18 dylib

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I have the same issue  It looks like it s unable to find the libmysqlclient library  A temporary fix that has worked for me is the following   export DYLD LIBRARY PATH  usr local mysql lib    I am not sure where the config is specifying the load path or what it s set to but my mysql install did not appear to be in it  I ll post again if I find a more permanent solution   Edit  Actually this fix appears to more accurately address the problem

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Just ran into this problem  All I had to do is uninstall mysql2 gem and reinstall it  Hope this works for other people

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This fix worked very well for me   Add the following to to your    profile  export DYLD LIBRARY PATH  usr local mysql lib  DYLD LIBRARY PATH   http   www rickwargo com 2010 12 16 installing-mysql-5-5-on-os-x-10-6-snow-leopard-and-rails-3

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Add the below to your    bash profile   export DYLD LIBRARY PATH  usr local mysql lib  DYLD LIBRARY PATH   This worked for me

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For me this was just because I had upgraded mysql but hadn t updated the mysql2 gem - a reinstall of the gem will fix it     gem pristine mysql2

[mysql] Library not loaded: libmysqlclient.16.dylib error when trying to run 'rails server' on OS X 10.6 with mysql2 gem

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