I think most of you use Applications installed from the Mac App Store. It really is convenient and there are tons of Apps to choose from. However, occasionally you may need to install Apps downloaded from a Developers website. I install many Apps from Developer websites. Sometimes I prefer that to the App Store version of the App, or the Developer’s App is not on the App Store. This video demonstrates the proper way to install Apps downloaded from websites. It also mentions how to uninstall them as well.