When I run a Rails (rails s) app on my localhost (OSX Mavericks), I get this error
message:/Users/adam/.rvm/gems/ruby-2.0.0-p481/gems/mysql2-0.3.16/lib/mysql2.rb:8:in `require': dlopen(/Users/adam/.rvm/gems/ruby-2.0.0-p481/extensions/x86_64-darwin-13/2.0.0-static/mysql2-0.3.16/mysql2/mysql2.bundle, 9): Library not loaded: libmysqlclient.18.dylib (LoadError)
Referenced from: /Users/adam/.rvm/gems/ruby-2.0.0-p481/extensions/x86_64-darwin-13/2.0.0-static/mysql2-0.3.16/mysql2/mysql2.bundle
Reason: image not found - /Users/adam/.rvm/gems/ruby-2.0.0-p481/extensions/x86_64-darwin-13/2.0.0-static/mysql2-0.3.16/mysql2/mysql2.bundle
from /Users/adam/.rvm/gems/ruby-2.0.0-p481/gems/mysql2-0.3.16/lib/mysql2.rb:8:in `<top (required)>'
from /Users/adam/.rvm/gems/ruby-2.0.0-p481@global/gems/bundler-1.6.2/lib/bundler/runtime.rb:76:in `require'
from /Users/adam/.rvm/gems/ruby-2.0.0-p481@global/gems/bundler-1.6.2/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
from /Users/adam/.rvm/gems/ruby-2.0.0-p481@global/gems/bundler-1.6.2/lib/bundler/runtime.rb:72:in `each'
from /Users/adam/.rvm/gems/ruby-2.0.0-p481@global/gems/bundler-1.6.2/lib/bundler/runtime.rb:72:in `block in require'
from /Users/adam/.rvm/gems/ruby-2.0.0-p481@global/gems/bundler-1.6.2/lib/bundler/runtime.rb:61:in `each'
from /Users/adam/.rvm/gems/ruby-2.0.0-p481@global/gems/bundler-1.6.2/lib/bundler/runtime.rb:61:in `require'
from /Users/adam/.rvm/gems/ruby-2.0.0-p481@global/gems/bundler-1.6.2/lib/bundler.rb:132:in `require'
from /Users/adam/rubydev/logistadvise/config/application.rb:7:in `<top (required)>'
from /Users/adam/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.0/lib/rails/commands.rb:76:in `require'
from /Users/adam/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.0/lib/rails/commands.rb:76:in `block in <top (required)>'
from /Users/adam/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.0/lib/rails/commands.rb:73:in `tap'
from /Users/adam/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.0/lib/rails/commands.rb:73:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
I am not sure how I already installed MySQL, but I guess it's in the subfolder called Cellar.
Here's how my bash_profile looks like:
MYSQL=/usr/local/mysql/bin
export PATH=$PATH:$MYSQL
export DYLD_LIBRARY_PATH=/usr/local/mysql/lib:$DYLD_LIBRARY_PATH
export PG_DUMP="/Applications/Postgres.app/Contents/MacOS/bin/"
#PATH=$PG_DUMP:$PATH
...
How to solve this issue?
I had the same problem. Because I installed it with brew, the location of the DYLD changed. Try this:
export DYLD_LIBRARY_PATH=/usr/local/mysql-5.1.67-osx10.6-x86_64/lib:$DYLD_LIBRARY_PATH
Check if the path above exists first with something like the following and obviously adjust the export path accordingly:
ls -1 /usr/local/mysql-5.1.67-osx10.6-x86_64
You could probably make a symbolic link or something. It was kind of annoying for me, but using the correct path fixed it for me.
And also try which mysql to check if you have mysql in your path. If you don't get any output obviously the paths are messed up.
sudo install_name_tool -change libmysqlclient.18.dylib /usr/local/mysql/lib/libmysqlclient.18.dylib ~/.rvm/gems/ruby-2.0.0-p481/extensions/x86_64-darwin-13/2.0.0-static/mysql2-0.3.16/mysql2/mysql2.bundle
This should work for you.
来源：https://stackoverflow.com/questions/24328935/rails-mysql-on-mavericks-library-not-loaded-libmysqlclient-18-dylib