Harrison Weber:
As you’ll see in Apple’s carefully worded explanation of Gatekeeper, each user is given the choice of deciding if they wish to allow non-App Store apps or not. But what’s the default setting going to be? In the screenshot provided by Apple, it looks like “Mac App Store and identified developers” is the default, and will likely go unchanged by the average, non-tinkering user.
The thrust of this piece by Weber is that Apple will eventually iOS-ify the Mac and force users (and developers) into the Mac App Store. This isn't going to happen. That will stop upgrades and it will slow growth. I, for one, welcome the change. I think the default setting is the right one and I can feel even more secure using my Mac than I do now. I use OnyX to scan new downloads from some third party site for potential threats — especially for programs that want my admin password. This will remove that fear. I'm very pleased. I'll be an early adopter for sure. Looks like a really solid release.