The latest Juniper release is 3.1.0. Either the official Arduino IDE or Platform IO can be used with Juniper. We have also created a syntax coloring package for the VS Code text editor. It can be used by searching for Juniper in the extensions manager.
After installing the Windows package, run Juniper.exe from the command prompt to use the compiler. You may need to restart your computer for the user PATH changes to take effect.
Alternatively you can download Juniper packaged as a zip file.
After installing the Linux deb package, run juniper from the terminal to use the compiler.
After downloading and extracting the Linux zip file, run the Juniper program to use the compiler (may require you to add executable permission to the Juniper file with chmod).
After downloading and extracting the Mac OSX zip file, run the Juniper program to use the compiler (may require you to add executable permission to the Juniper file with chmod). Once .NET gets support for OSX ARM, we will support these platforms. At the current moment the above distribution is for x64 only.
Note: old releases of 2.3.0 or earlier require Mono on Linux to work. Install Mono by following these instructions: http://www.mono-project.com/docs/getting-started/install/linux/