Even though you can grab a lot of great apps right from the App Store, every Mac user eventually runs into some software that simply isn’t available there — and when that happens, you have no choice but to install said app manually. Which can be problematic because the operating system won’t let you run apps that comes from unidentified developers. This is meant to protect you from malware and other forms of trickery: The good news is that this problem actually has a very simple workaround. You don’t have to install any special tools or change any system settings….
Read the full article: How to Open Mac Apps From Unidentified Developers