Leopard Tip: Spotlight Calculator
Mac OS X Leopard has hundreds of features. Some of these go by unnoticed, even when mentioned in the full list on Apple.com. One of these features is the Spotlight calculator. If you a type simple problem into Spotlight the first result will be the answer. Same thing goes with words. If you type a word into Spotlight the first result is the definition, then you can click the definition to open it in Dictionary.app.
This is very useful to solve a problem quickly, and you don’t have to open any applications!

I’m still running Tiger and in Safari I tried typing different things in the built-in Google search bar and I get similar results from Google, too. Awesome! Thanks for the tip!
Oh, well I guess Google does it too.
spotlight on my mac didn’t working
can anyone help me about that?
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This calculator is indeed good, but some inaccuracies come up when you try to multiply numbers without using the times character. Let’s say you type in: 3(2+1). If you type that in alone, it will give the right result, 9, but if you were to type: 3(2+1)+6, the calculator would say it equals 27 when really it equals 15. This is because for some reason the calculator is also multiplying the 6 by 3, making the formula 3(2+1)+18, which turns into 9+18 which equals 27. It’s probably a flaw in Apple’s programming, but little inaccuracies like this in their apps and how little they debug things can start to get really annoying.
Don’t believe me? You can test this out right now and see for yourself.