We combine some of the best emulation projects together into one beautiful unified application that simply organizes your personal games library. Plug in your gamepad, select it from the list… and press start to begin your adventures. Via the Controller Preferences, simply auto- magically assign buttons with any generic HID compliant USB or Bluetooth game controller. Why restrict yourself to just the keyboard? Although it is not a requirement, OpenEmu is best used with a peripheral gamepad or controller to interact with your games. Up, Up, Down, Down, Left, Right, Left, Right, B, A, Start OpenEmu uses a modular architecture, allowing for game-engine plugins, allowing OpenEmu to support a host of different emulation engines and back ends while retaining the familiar macOS native front end. One third-party library example is Sparkle, which is used for auto-updating. The project leverages modern macOS technologies, such as Cocoa, Core Animation with Quartz Composer, and other third-party libraries. OpenEmu is an open source project whose purpose is to bring macOS game emulation into the realm of first class citizenship.