Below are macOS and Windows versions of RTcmixShell, an application that lets you edit and run RTcmix scores without having to learn Unix shell commands. This app is very basic and somewhat crash-prone, especially on Windows. Please save your scores often.
• RTcmixShell-v1.0b7-macOS.zip (Mac)
• RTcmixShell-win-beta3.zip (Windows)
Please note that the Windows version of RTcmixShell is not as up-to-date as the Mac one, and it may have trouble with certain audio devices. (You might need to use a different audio buffer size than the default.)
You can put this application anywhere on your Mac, but the Applications folder is a good choice. When you double-click the app the first time, it will probably refuse to open. If this happens, right-click on the program icon, and choose Open. Then press Open in the dialog that appears. After that, you should be able to launch RTcmixShell.
To write RTcmix scores, you can use any full-featured programmer’s plain text editor, such as Atom, Sublime, or Microsoft Visual Studio Code (all available for Windows and Mac), or BBEdit (Mac). If you set the syntax highlighting in these programs to treat RTcmix .sco files as if they were .c source code files, you’ll be in business. Load the finished scores into one of the RTcmix apps above to play them.