Edit: After half day, my wife’s Mac started having the same problem. I have then applied the solution that I found in the Apple
Russian Hacker Shows Off New "Free In-App Purchase" Exploit For Mac Apps
Earlier this month we seen Russian hacker Alexei Borodin release a hack which allowed you to get any in app purchases for free and caused Apple to take huge action. But today Borodin has striked again showing of his new exploit which allows you to do the same with Mac OS X apps.
The In app purchase system for iOS and Mac go through a very similar process which mean the In-Appstore did not need much adaption at all. The hack is basically done by scamming your iPhone , iPad or Mac in to thinking it has made a transaction with Apple’s servers
From some of the information we have received it suggests the hack has been responsible for around 8,460,017 in app purchases on iOS device’s
We have full faith in Apple who are already fighting against the iOS exploit and has plenty of time to release a fix with in Mac OS X Mountain Lion which is set to be released on July 25th