Mac App Store now warns customers buying pre-installed apps

As Macworld points out Apple has added a new drop-down dialog box to the Mac App Store, the purpose of the update is to alert customers who are about to purchase an app they’ve already got installed.

Software is being added to the Mac App Store all the time. Many are new titles while several have existed long before the store did. Today, customers who bought apps before the store debuted are faced with a dilemma: update that software manually or enjoy the benefits of the Mac App Store — like simple updating and easy multi-Mac installations — buy purchasing the app a second time.

While this warning hasn’t eliminated the problem, it does tip customers off to the fact that they’re about to pay for an app they already own.