MacOS – Alternative to CTRL + C of macOS Terminal in Sublime Text 3

Add "path": "/Library/Frameworks/Python.framework/Versions/3.3/bin/" to your Python3 build file. Mine looks like this:

{
    "cmd": ["python3", "-u", "$file"],
    "file_regex": "^[ ]*File \"(...*?)\", line ([0-9]*)",
    "selector": "source.python",
    "encoding": "utf8",
    "path": "/Library/Frameworks/Python.framework/Versions/3.3/bin/"
}

Note: Make sure the path to Python3 is relative to your machine - that was true for mine

In the Terminal preferences, go to Settings and select Keyboard in the panel. There you can set various key combinations to send whatever string you wish to the shell (or the program currently running).