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-1.0.9-macOS-signed.zip (Mac - signed and notarized)
• RTcmixShell-1.0.9-macOS.zip (Mac - unsigned)
• RTcmixShell-v1.0b7-macOS.zip (Mac - old)
• 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 ask you for permission to use the microphone. Make sure you give it permission! This affects audio output as well as audio input. If you don’t give it permission, you won’t hear any sound. You should be able to give it permission later by going to System Preferences > Security & Privacy, and pressing the Privacy tab. Choose Microphone in the list at the left, and look for RTcmixShell in the list at the right. Check the checkbox next to RTcmixShell.
You probably should be using the signed/notarized version — and you have to on Catalina and later. But if you like updating the RTcmix shared library, which you can build from source, then you need to use the unsigned version. On first launch, it probably will 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.