Ruby on Rails and MAMP PRO – It’s a jungle out there.


If you’re looking for the how to, and have no intention reading my rambling, go on and scroll down a little bit ­čÖé

So I’ve started learning Rails for a while now. I’ve been exploring a lot in the world of ruby and rails. Found tons of interesting stuff, watched a lot of screencasts, graduated from Rails for Zombies, and much more, but now, about a week ago I decided to finally get my hands dirty on my own Mac OS X Lion, and thats where it all started. Finally, today I decided not to give up and finish setting up Rails.

MAMP PRO Is a pit of bugs.

I develop with PHP a lot, and MAMP Pro has worked for me flawlessly up until now. I love the nice graphical interface I get to manage my local domain hosts (, etc. and probably because of that I’ve managed to overlook all the bugs (for example not being able to reboot/shutdown my mac, until I’ve force quitted┬áMAMP), but this day changed my perspective a little bit. But that is not what this story is about.


MAMP PRO and Ruby On Rails

This is the part where it got bad. At first, I thought – hey – wouldn’t it be nice to run Rails with the same MySQL server as MAMP, but hey – MAMP has moved MySQL installation to their local directory. Not only that, but it is missing files, so I can’t compile Ruby gems to install with MAMP.

So I went ahead and searched. I found some useful posts, or at least at that moment I thought so, about MAMP And Ruby: [ Article 1 ] , and [ Article 2 ] , but all I did was screw up my system.

In the end, I wish in all the hours I spent on Google, that I found a blog post like this one. It turns out, installing MAMP Pro and Ruby On Rails, and setting them up is super-duper-easy.


How to install Ruby on Rails 3.2.1 with Ruby 1.9.3 and MAMP PRO 2.0.1

First of all. If you don’t already┬áhave┬áMAMP or MAMP PRO on your system, and you don’t have any intention of using PHP, stop reading this article. You don’t need MAMP Pro. Period. Take a look at POW and Brew. That’s all you need.

For the less fortunate – I assume you already have MAMP Pro, and have tried running gem install mysql2 without any success.
I use RVM, and if you don’t then I guess you have to be careful, and before certain commands need a sudo (like sudo gem for example), I’ll be writing about the RVM process, and yours shouldn’t be much different, just tweak it a little accordingly.

First, make sure you get to this point:


~ ruby -v
ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-darwin11.3.0]
~ rails -v
Rails 3.2.1


Now that we’re on the same page this is what you do.

First install brew. Here is their installation documentation:
Basically all you need is this command:
[plain]mkdir homebrew && curl -L | tar xz –strip 1 -C homebrew┬á[/plain]

Now, MAMP stands for Mac- Apache, MySQL and PHP. I know you (and I) have MySQL already installed, but that isn’t going to cut it, as I said before – MAMP has moved MySQL to a different location. Even their mysql.sock file is somewhere else, so we’re going to install another MySQL on the system with

[plain] brew install mysql [/plain]

Now that you have MySQL – Just install the mysql2 gem

[plain] gem install mysql [/plain]


You also might want to make an alias for the mysql.sock file, which MAMP has also moved for us, by running:

[plain]sudo ln -s /Applications/MAMP/tmp/mysql/mysql.sock /tmp/mysql.sock[/plain]


I would also suggest that you take a look at POW, it is a great, tiny, rails server for local development. Here is some information on Stack Overflow.
Thats it. I hope this helps you with MAMP and Rails, it sure as hell would helped me.