What do you develop your games on?

Hello everyone!

A fun and very interesting question, I got a little curious over.
What kind of equipment do you use when you program? And it is the same machine that you are playing in?

I use an Macbook Air 13 "and it is the same machine I play on but I also play other games on the Xbox one.

* Edit: more info about my computer if any one wants to know *

  • OS: MacOS 10.9.2
  • CPU: Intel i5-4250 1.30GHz
  • Memory: 4GB
  • GPU: Intel HD Graphics 5000 1024MB
  • Resolution: 1440x900

(Sorry for my English i’m from Sweden)