Fact: No it isn't. Fact: This would be a MONOPOLY, which defined by the Government, is illegal. So why would Apple want to get into a heap of legal trouble just over disabling unsigned apps? They wouldn't want to get into trouble. People, please clear your mind. As more and more people (& businesses) adopt Macs as their computer, they don't want trade secrets, or any other type of information to be stolen by hackers. Also, as more seniors and people who don't have the knowledge on how to use OS X, they will like the security the OS X offers basically for $30, which is signed apps and MAS apps. This security can also be turned off.