Apple’s Mac App Store went live today. Introduced in October as part of the upcoming OS X 10.7 Lion, it was also announced to be offered as part of 10.6 Snow Leopard. Effectively, the Mac App Store allows you to buy and install applications on your Mac much in the same way that you do for your iOS device(s).
In order to use it, you will need to make sure you’ve updated your computer to OS X 10.6.6. Select “Software Update…” from the Apple menu to both upgrade OS X and install the App Store. You will be prompted to restart.
Once your computer has restarted, Select “App Store…” from the Apple Menu. However, don’t buy anything yet; restart your computer first—there have been reports of a glitch in connecting to Apple that can be remedied by doing this.
Once your computer restarts, relaunch the App Store and log in using your Apple ID (or get one if you don’t have one). Now you can find a piece of software you’d like to purchase and install. Simply click the price and the App Store will deduct the price from your iTunes account (or ask for a credit card if there are insufficient funds), then download and install the software on your Mac.