Suspend any one app when not in focus. Prints each app name in focus. On exit (ctrl-c), app will resume as normal.

Start desired app, then run script with: python myAppNap.py [app name] Ex. python myAppNap.py Unity

If no argument is given, will monitor apps in focus

Tested in Mac OS Sierra

Disallow suspending parent app (eg Terminal, if launched from Terminal)
DONE - do nothing if invalid name given