How to Allow Apps from Anywhere in macOS Gatekeeper (Monterey, Big Sur, Catalina, Mojave, Sierra, High Sierra)
Gatekeeper in MacOS is now stricter than ever, defaulting to only allow options for apps downloaded from either the App Store or the App Store and identified developers. Advanced Mac users may wish to allow a third option, which is the ability to open and allow apps downloaded from anywhere in macOS Ventura, macOS Monterey, MacOS Big Sur, macOS Catalina, macOS Sierra, macOS High Sierra, and MacOS Mojave.