I’ve recently been diving into Steam games on the latest Humble Indie Bundle. But early on I had a big problem with control input via the standard Mac keyboard. Especially in games that rely on quick, arcade-like movements (e.g. Super Meat Boy), the keyboard isn’t precise enough and ill equipped to handle the bangs and keypresses of an average gaming run.
Enter the Mac app Joystick Mapper. For $5 on the Mac App Store I plugged in a PS3 Dualshock 3 controller via USB, mapped several buttons and directions to some keyboard and mouse commands, and I was ready to go. It makes a huge difference. Highly recommended.