You can create a shell script or a Python or Ruby script and run it on the Mac by using "Terminal" ... if you have Finder open, and you click on the icon for the file containing the source code of a saved shell script, is there a way to have that script run, instead of opening in my text editor ?
Yes - just put a .command
suffix on the script.
Note: make sure the script is executable, e.g.
$ chmod +x myscript.command