Ah, it doesn't like
If you open the QuickPrint.sublime-settings file can you uncomment/add the setting:
replacing it with your computer name please. You should restart ST before trying the print.
If this doesn't work you could edit the following line(s) temporarily in QuickPrint.py, as they are not needed for OSX:
COMPUTER = sublime.load_settings(PACKAGE_SETTINGS).get("comp_name", \
Thank you for taking the time. Andy.