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Many years ago, Sun (now Oracle) created a process by which you could create a Mac application from a Java Jar file (or even a series of Jar files). The directory must end with the extension, “. If you don’t already know it, a macOS application is actually a directory that contains a series of files in a specific, well-defined layout. More on those later.)Īs those assumptions infer, you won’t have a “perfect” app whose menu items work exactly like a native Mac application, but you will at least have a Mac application that you can start by double-clicking an application icon. (I understand that those first two items can be big assumptions. I assume your application is a Java Swing or JavaFX GUI app.You aren’t concerned about implementing macOS-specific features, like enabling the Preferences and Quit menu items, or implementing Mac-specific keystrokes in your app.You have a single Jar file you can already run with the java -jar command.I tested this with Java 1.8 on macOS 10.12.5 (Sierra) on June 29, 2017. If you're using a Mac notebook computer, plug it into AC power.In this article I’ll show how to build a macOS application from a Java Jar file. It takes time to download and install macOS, so make sure that you have a reliable Internet connection.

Time Machine makes it simple, and other backup methods are also available. If your Mac isn't compatible with macOS Sierra, the installer will let you know.īefore installing any upgrade, it’s a good idea to back up your Mac. To find your Mac model, memory, storage space, and macOS version, choose About This Mac from the Apple () menu. MacBook Pro introduced in mid 2010 or later MacBook Air introduced in late 2010 or later Your Mac also needs at least 2GB of memory and 8.8GB of available storage space.

You can upgrade to macOS Sierra from OS X Lion or later on any of the following Mac models.