Can't install mysql2 gem on macOS Sierra

Question

I\'m setting up my development environment in the new macOS Sierra .

First of all, I installed Rbenv, Ruby (2.3.1)

Answer 1

So I ran into this similar issue and for me it turned out to be a wrong ruby version and incompatible MySQL version. I use ruby 2.3 on most of my projects but inherited a 2.1 project. Changing to rvm to use 2.1 got me a little further.

Then I found this: https://github.com/brianmario/mysql2/issues/603 that said you had to use mysql2 gem version greater than 0.3.17 with MySQL version 5.7

Updated gem to 0.3.17 and it fired right up. Hope this helps someone.