RTcmix Standalone Applications
Below are two applications that will let you run RTcmix scores without having to learn Unix shell commands. These apps are fresh out of the oven. Please report any problems running them.
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. Go to System Preferences > Security & Privacy, and press the Open Anyway button, if there is one. Otherwise, see if you can set the Allow apps downloaded from: radio button to Anywhere. (Which way you do it is OS-dependent.) You may have to type in an admin password at this point. After that, you should be able to launch RTcmixShell. Set your Allow apps preference back to the way it was. You shouldn’t have to do this again — well, maybe when you try to run a newer version of it.
To write RTcmix scores, you can use any full-featured programmer’s plain text editor, such as Atom or Sublime (both 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.