Installing mysql2 gem for Ruby on Rails with Mac OSX 10.6

Question

I am having a problem installing the mysql2 gem.

This comes up when I do gem install mysql2:

Marks-MacBook-Pro:~ Mark$ gem install mysql         


        

Answer 1

If you used homebrew to install mysql, brew install mysql,this worked for me:

gem install mysql2 -v 'x.x.x' -- --with-mysql-config=/usr/local/Cellar/mysql/y.y.y/bin/mysql_config

x.x.x = version of the mysql2 gem you want to install
y.y.y = the version of mysql you have installed ls /usr/local/Cellar/mysql to find it.

to get the version of mysql

brew info mysql                                                                                                                                                                                                     
mysql: stable 5.7.19 (bottled)
               ...
/usr/local/Cellar/mysql/5.7.19 (322 files, 233MB) *

               ...

then if you want to install with bundle:

bundle config build.mysql --with-mysql-config=/usr/local/Cellar/mysql/y.y.y/bin/mysql_config

Answer 2

I know this has been answered multiple times however, here's what's working for me with: May 20, 2019 OSX Mojave 10.14.4 MySQL Ver 14.14 Distrib 5.7.24, for osx10.14 (x86_64) using EditLine wrapper ruby 2.5.0p0 (2017-12-25 revision 61468) [x86_64-darwin17] Rails 5.2.1

export LIBRARY_PATH=$LIBRARY_PATH:/usr/local/opt/openssl/lib/
gem install mysql2 -- --with-mysql-config=/usr/local/Cellar/mysql\@5.7/5.7.24/bin/mysql_config

change "/usr/local/Cellar/mysql@5.7/5.7.24/bin/mysql_config" to whatever your current valid path is from "/usr/local/Cellar/mysql"

Hope this helps!

Answer 3

I had same problem after upgrading to Catalina (10.15.x)

My Gemfile.lock has defined mysql2-0.3.20, which I could not get installed. But it worked, when I upgraded it to mysql2-0.5.2

gem update mysql2 -- --srcdir=/usr/local/include/mysql/

Be sure that you have installed mysql with brew.

brew install mysql
brew link mysql                                                                                                               

(Linking /usr/local/Cellar/mysql/8.0.18... 95 symlinks created)

However, after this the gem mysql2 was installed, but the bundle update mysql2 didn't work.

But this other answer helped me https://stackoverflow.com/a/39628463/110214

bundle config --local build.mysql2 "--with-ldflags=-L/usr/local/opt/openssl/lib --with-cppflags=-I/usr/local/opt/openssl/include"

bundle update mysql2

Answer 4

To fix for a manual gem install:

brew install openssl
gem install mysql2 -- --with-opt-dir="$(brew --prefix openssl)"

To fix for all bundle installs:

brew install openssl
bundle config --global build.mysql2 --with-opt-dir="$(brew --prefix openssl)"
bundle install

Answer 5

Following command worked for me successfully.

x.x.x = version of mysql2 you want to install.

gem install mysql2 -v 'x.x.x' -- --srcdir=/usr/local/mysql/include

Answer 6

I had the exact same issue and errors trying to install mysql2. I thought my mamp install of MySQL would work fine and spent a few hours playing around with paths to get that to work - no success.

Finally came across this post from ALoR and installed a fresh version through homebrew - however - be sure to follow ALL the instructions from homebrew! I missed a few steps and wasted another hour tracking down that problem - here are those instructions: https://stackoverflow.com/a/11061487/1241271

After MySQL was successfully installed, I ran: sudo gem install mysql2 and it worked like a charm.

Hope this helps someone from wasting several hours because they neglected to read the docs (newb mistake).