Apple announced this week that that its previously announced Mac App store will be open for business on January 6th.

The company says the online store will be available to Mac users in 90 countries and will feature paid and free apps in categories like Education, Games, Graphics & Design, Lifestyle, Productivity and Utilities.

“The App Store revolutionized mobile apps,” said Steve Jobs, Apple’s CEO. “We hope to do the same for PC apps with the Mac App Store by making finding and buying PC apps easy and fun.”

Similar to Apple's mobile app store, the Mac App Store will let users browse new and noteworthy apps, find out what’s hot, view staff favourites, search categories, read customer ratings and reviews and, of course, buy Mac applications.

In a move that will please owners of multiple Mac computers, Apple says purchased apps will be allowed to run on all of the Macs in a home at no extra charge. The app store will also keep track of which apps have been purchased and let buyers know when updates are available. Similar to the mobile app store, users can choose to update one app at a time or all of them at once.

Access to the Mac App Store will become available to Mac OS X Snow Leopard users on January 6th as a free download through Software Update.

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