This was on earlier Apples. It should be in OS X. I objected to the price, but just skipped a couple of Starbuck's Latte Grandes. It was well worth the sacrifice. Download the free trial and see. Click - done!

btw, if you want to follow guns' advice, you will want to turn on full keyboard access in the keyboard preference pane.

>> You can also just tab over to the desired button and then press space to select it.

I can see how this could be useful, but then you could just learn to press enter (for blue-lighted buttons) and space (for blue-outlined buttons) for dialogs. You can also just tab over to the desired button and then press space to select it.

I'm only mentioning this since it does cost $10.

Does what it says, no more and no less, just like well behaved applications are supposed to do. I like it.

Great little preferance pane especially if you use your trackpad on your laptop. It saves you having to constantly scroll around the page saying yes to this, no to that etc etc etc.