If you already are comfortable with a programming editor, use that one. Just double-check with an instructor to make
sure it will work.
If you are unsure, we suggest [Sublime Text 2](http://www.sublimetext.com/2)
## 1. Open your Editor
To start Sublime Text 2, please select it from the Start Menu under 'All
![Submlime Text 2](/img/installfest/sublime2.png?raw=true)
1. Double-click the `Applications` folder in the disk image, or navigate to `Applications` in the left panel of
1. In `Applications`, scroll down until you see `Sublime Text 2`.
1. Double-click `Sublime Text 2` to open the editor.
Type this in the Terminal to start Sublime:
Or, you can use your GUI's menus, as an icon has most likely been installed.
## 2. Set some basic preferences
Sublime Text 2 reads its preferences from text files. This means you can easily
edit settings, check your settings into version control, or share settings with
copy & paste. That's what we're going to do with some common preferences for
Open up User Settings (`Sublime Text 2 > Preferences > Settings - User`) and paste in these preferences:
Save the User Settings file (`File > Save`). Your new preferences are now in effect.
Now you have an editor that you can use to open any text file, including Ruby programs.
## Next Step
You've got everything! Proceed to the [Checklist](/installfest/checklist).