Another advantage of the Mac App Store, besides pausing downloads, safe uninstalls, and easy re-downloads of Mac OS X apps, is the safety of knowing that anything in the Mac App Store has been vetted by Apple.
One way your Mac makes sure you’re (relatively safe) from rogue apps is what’s called Gatekeeper. By default, this bit of software only allows you to install verified apps from the Mac App Store on your Mac. What if, however, you want to download software from a Mac developer who doesn’t distribute their software on the Mac App Store? You’ll need to bypass Gatekeeper in order to do so.
Here’s how to do that safely.