One million downloads already.

That didn't take long.

Apple's Mac App Store tallied 1 million downloads in its first day of availability, the company announced today.

"We're amazed at the incredible response the Mac App Store is getting," Apple CEO Steve Jobs said in a statement. "Developers have done a great job bringing apps to the store and users are loving how easy and fun the Mac App Store is."

Apple launched its Mac App Store yesterday to Mac OS X 10.6 Snow Leopard users. It was made available in the free Mac OS X 10.6.6 software update. According to Apple, the store currently has over 1,000 free and paid apps in categories ranging from education to games.

But the Mac App Store's first day didn't bring only good news for Apple.

A reported Mac App Store hack being shared across the Web allows users to take digital receipts from free applications and use them on pirated copies of a paid app. The receipts effectively fool the paid app into believing use has been authorized, thus allowing users to run the programs and pay nothing for them. Apple has yet to comment on the problem.