Step 5: Use your new app
When your new app has finished downloading, it will be listed as Installed in the Purchases section of the Mac App Store, and the app's icon in Launchpad will no longer be dimmed--the app is ready for you to use.
You can launch your new app just as you would any other app: by double-clicking it inside the Applications folder, by clicking it in LaunchPad, or, (if it's in the Dock) by clicking it in the Dock. You can also customize where it appears in Launchpad, if you want. (We have a separate article on how to rearrange apps in Launchpad.)
Update your apps
Apps purchased through the Mac App Store are also updated through the Mac App Store, so you might want launch the Mac App Store app every once in a while to check for updates--just click the Updates button in the toolbar. You can also look at the Mac App Store icon in your Dock on in Launchpad; if the icon has a red badge with a number on it, there are updates available. (The red badge does not appear on the Mac App Store icon in your Applications folder.)
Sign up for Computerworld eNewsletters.